diff --git a/CMakeLists.txt b/CMakeLists.txt
index b9057cf..549d470 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -233,6 +233,7 @@ add_executable(${EXECUTABLE_NAME} WIN32
 )
 
 target_sources(${EXECUTABLE_NAME} PUBLIC
+    "src/dsound_compat.h"
     "src/fps_limiter.cc"
     "src/fps_limiter.h"
     "src/platform_compat.cc"
diff --git a/src/combat_ai.cc b/src/combat_ai.cc
index e32d9ab..ef8080a 100644
--- a/src/combat_ai.cc
+++ b/src/combat_ai.cc
@@ -28,6 +28,7 @@
 #include "tile.h"
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 // 0x51805C
@@ -1399,7 +1400,6 @@ Object* _ai_danger_source(Object* a1)
         attackWho = -1;
     }
 
-    
     Object* whoHitMe = a1->data.critter.combat.whoHitMe;
     if (whoHitMe == NULL || a1 == whoHitMe) {
         targets[0] = NULL;
diff --git a/src/dsound_compat.h b/src/dsound_compat.h
new file mode 100644
index 0000000..e484d60
--- /dev/null
+++ b/src/dsound_compat.h
@@ -0,0 +1,17 @@
+#ifndef DSOUND_COMPAT_H
+#define DSOUND_COMPAT_H
+
+#ifdef _WIN32
+#define HAVE_DSOUND 1
+
+#define WIN32_LEAN_AND_MEAN
+#define NOMINMAX
+#include <windows.h>
+
+#include <mmreg.h>
+
+#define DIRECTSOUND_VERSION 0x0300
+#include <dsound.h>
+#endif
+
+#endif /* DSOUND_COMPAT_H */
diff --git a/src/movie.cc b/src/movie.cc
index f577cd8..c3dd2b3 100644
--- a/src/movie.cc
+++ b/src/movie.cc
@@ -330,8 +330,12 @@ int _noop()
 void movieInit()
 {
     movieLibSetMemoryProcs(movieMallocImpl, movieFreeImpl);
+#ifdef HAVE_DSOUND
     movieLibSetDirectSound(gDirectSound);
     gMovieDirectSoundInitialized = (gDirectSound != NULL);
+#else
+    gMovieDirectSoundInitialized = false;
+#endif
     movieLibSetPaletteEntriesProc(movieSetPaletteEntriesImpl);
     _MVE_sfSVGA(640, 480, 480, 0, 0, 0, 0, 0, 0);
     movieLibSetReadProc(movieReadImpl);
diff --git a/src/movie_lib.cc b/src/movie_lib.cc
index e500352..3270ba9 100644
--- a/src/movie_lib.cc
+++ b/src/movie_lib.cc
@@ -63,11 +63,15 @@ int _sync_late = 0;
 // 0x51EDEC
 int _sync_FrameDropped = 0;
 
+#ifdef HAVE_DSOUND
 // 0x51EDF0
 LPDIRECTSOUND gMovieLibDirectSound = NULL;
+#endif
 
+#ifdef HAVE_DSOUND
 // 0x51EDF4
 LPDIRECTSOUNDBUFFER gMovieLibDirectSoundBuffer = NULL;
+#endif
 
 // 0x51EDF8
 int gMovieLibVolume = 0;
@@ -261,8 +265,10 @@ unsigned int _$$R0063[256] = {
 // 0x6B3660
 int dword_6B3660;
 
+#ifdef HAVE_DSOUND
 // 0x6B3668
 DSBCAPS stru_6B3668;
+#endif
 
 // 0x6B367C
 int _sf_ScreenWidth;
@@ -469,20 +475,24 @@ void _MVE_MemFree(STRUCT_6B3690* a1)
     a1->field_4 = 0;
 }
 
+#ifdef HAVE_DSOUND
 // 0x4F48F0
 void movieLibSetDirectSound(LPDIRECTSOUND ds)
 {
     gMovieLibDirectSound = ds;
 }
+#endif
 
 // 0x4F4900
 void movieLibSetVolume(int volume)
 {
     gMovieLibVolume = volume;
 
+#ifdef HAVE_DSOUND
     if (gMovieLibDirectSoundBuffer != NULL) {
         IDirectSoundBuffer_SetVolume(gMovieLibDirectSoundBuffer, volume);
     }
+#endif
 }
 
 // 0x4F4920
@@ -490,9 +500,11 @@ void movieLibSetPan(int pan)
 {
     gMovieLibPan = pan;
 
+#ifdef HAVE_DSOUND
     if (gMovieLibDirectSoundBuffer != NULL) {
         IDirectSoundBuffer_SetPan(gMovieLibDirectSoundBuffer, pan);
     }
+#endif
 }
 
 // 0x4F4940
@@ -733,9 +745,11 @@ int _syncWait()
 // 0x4F4EA0
 void _MVE_sndPause()
 {
+#ifdef HAVE_DSOUND
     if (gMovieLibDirectSoundBuffer != NULL) {
         IDirectSoundBuffer_Stop(gMovieLibDirectSoundBuffer);
     }
+#endif
 }
 
 // 0x4F4EC0
@@ -1051,6 +1065,7 @@ void _syncReset(int a1)
 // 0x4F5570
 int _MVE_sndConfigure(int a1, int a2, int a3, int a4, int a5, int a6)
 {
+#ifdef HAVE_DSOUND
     DSBUFFERDESC dsbd;
     WAVEFORMATEX wfxFormat;
 
@@ -1096,6 +1111,9 @@ int _MVE_sndConfigure(int a1, int a2, int a3, int a4, int a5, int a6)
     }
 
     return 1;
+#else
+    return 0;
+#endif
 }
 
 // 0x4F56C0
@@ -1110,16 +1128,19 @@ void _MVE_syncSync()
 // 0x4F56F0
 void _MVE_sndReset()
 {
+#ifdef HAVE_DSOUND
     if (gMovieLibDirectSoundBuffer != NULL) {
         IDirectSoundBuffer_Stop(gMovieLibDirectSoundBuffer);
         IDirectSoundBuffer_Release(gMovieLibDirectSoundBuffer);
         gMovieLibDirectSoundBuffer = NULL;
     }
+#endif
 }
 
 // 0x4F5720
 void _MVE_sndSync()
 {
+#ifdef HAVE_DSOUND
     DWORD dwCurrentPlayCursor;
     DWORD dwCurrentWriteCursor;
     bool v10;
@@ -1257,6 +1278,10 @@ void _MVE_sndSync()
             ++dword_6B3660;
         }
     }
+#else
+    _sync_late = _syncWaitLevel(_sync_wait_quanta >> 2) > -_sync_wait_quanta >> 1 && !_sync_FrameDropped;
+    _sync_FrameDropped = 0;
+#endif
 }
 
 // 0x4F59B0
@@ -1282,6 +1307,7 @@ int _syncWaitLevel(int a1)
 // 0x4F5A00
 void _CallsSndBuff_Loc(unsigned char* a1, int a2)
 {
+#ifdef HAVE_DSOUND
     int v2;
     int v3;
     int v5;
@@ -1343,6 +1369,7 @@ void _CallsSndBuff_Loc(unsigned char* a1, int a2)
     } else {
         ++dword_6B3AE4;
     }
+#endif
 }
 
 // 0x4F5B70
diff --git a/src/movie_lib.h b/src/movie_lib.h
index e19a650..14aff9a 100644
--- a/src/movie_lib.h
+++ b/src/movie_lib.h
@@ -1,13 +1,11 @@
 #ifndef MOVIE_LIB_H
 #define MOVIE_LIB_H
 
+#include "dsound_compat.h"
 #include "memory_defs.h"
 
 #include <SDL.h>
 
-#define DIRECTSOUND_VERSION 0x0300
-#include <dsound.h>
-
 typedef struct STRUCT_6B3690 {
     void* field_0;
     int field_4;
@@ -56,8 +54,10 @@ extern unsigned short word_51EBE0[256];
 extern int _sync_active;
 extern int _sync_late;
 extern int _sync_FrameDropped;
+#ifdef HAVE_DSOUND
 extern LPDIRECTSOUND gMovieLibDirectSound;
 extern LPDIRECTSOUNDBUFFER gMovieLibDirectSoundBuffer;
+#endif
 extern int gMovieLibVolume;
 extern int gMovieLibPan;
 extern MovieShowFrameProc* _sf_ShowFrame;
@@ -74,7 +74,9 @@ extern unsigned int _$$R0004[256];
 extern unsigned int _$$R0063[256];
 
 extern int dword_6B3660;
+#ifdef HAVE_DSOUND
 extern DSBCAPS stru_6B3668;
+#endif
 extern int _sf_ScreenWidth;
 extern int dword_6B3680;
 extern int _rm_FrameDropCount;
@@ -138,7 +140,9 @@ void movieLibSetMemoryProcs(MallocProc* mallocProc, FreeProc* freeProc);
 void movieLibSetReadProc(MovieReadProc* readProc);
 void _MVE_MemInit(STRUCT_6B3690* a1, int a2, void* a3);
 void _MVE_MemFree(STRUCT_6B3690* a1);
+#ifdef HAVE_DSOUND
 void movieLibSetDirectSound(LPDIRECTSOUND ds);
+#endif
 void movieLibSetVolume(int volume);
 void movieLibSetPan(int pan);
 void _MVE_sfSVGA(int a1, int a2, int a3, int a4, int a5, int a6, int a7, int a8, int a9);
diff --git a/src/scripts.cc b/src/scripts.cc
index cafade4..90836a8 100644
--- a/src/scripts.cc
+++ b/src/scripts.cc
@@ -25,6 +25,7 @@
 #include "window_manager_private.h"
 #include "world_map.h"
 
+#include <stdlib.h>
 #include <stdio.h>
 #include <time.h>
 
diff --git a/src/sound.cc b/src/sound.cc
index 6718ccb..7673221 100644
--- a/src/sound.cc
+++ b/src/sound.cc
@@ -80,6 +80,7 @@ const char* gSoundErrorDescriptions[SOUND_ERR_COUNT] = {
     "sound.c: invalid handle",
     "sound.c: no memory available",
     "sound.c: unknown error",
+    "sound.c: not implemented",
 };
 
 // 0x668150
@@ -88,8 +89,10 @@ int gSoundLastError;
 // 0x668154
 int _masterVol;
 
+#ifdef HAVE_DSOUND
 // 0x668158
 LPDIRECTSOUNDBUFFER gDirectSoundPrimaryBuffer;
+#endif
 
 // 0x66815C
 int _sampleRate;
@@ -114,8 +117,10 @@ bool gSoundInitialized;
 // 0x668174
 Sound* gSoundListHead;
 
+#ifdef HAVE_DSOUND
 // 0x668178
 LPDIRECTSOUND gDirectSound;
+#endif
 
 // 0x4AC6F0
 void* soundMallocProcDefaultImpl(size_t size)
@@ -166,6 +171,7 @@ const char* soundGetErrorDescription(int err)
 // 0x4AC7B0
 void _refreshSoundBuffers(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     if (sound->field_3C & 0x80) {
         return;
     }
@@ -340,11 +346,13 @@ void _refreshSoundBuffers(Sound* sound)
     sound->field_70 = v6;
 
     return;
+#endif
 }
 
 // 0x4ACC58
 int soundInit(int a1, int a2, int a3, int a4, int rate)
 {
+#ifdef HAVE_DSOUND
     HRESULT hr;
     DWORD v24;
 
@@ -475,11 +483,16 @@ out:
     gSoundLastError = SOUND_NO_ERROR;
 
     return 0;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AD04C
 void soundExit()
 {
+#ifdef HAVE_DSOUND
     while (gSoundListHead != NULL) {
         Sound* next = gSoundListHead->next;
         soundDelete(gSoundListHead);
@@ -508,11 +521,13 @@ void soundExit()
 
     gSoundLastError = SOUND_NO_ERROR;
     gSoundInitialized = false;
+#endif
 }
 
 // 0x4AD0FC
 Sound* soundAllocate(int a1, int a2)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return NULL;
@@ -588,6 +603,10 @@ Sound* soundAllocate(int a1, int a2)
     gSoundListHead = sound;
 
     return sound;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return NULL;
+#endif
 }
 
 // 0x4AD308
@@ -680,6 +699,7 @@ int soundLoad(Sound* sound, char* filePath)
 // 0x4AD504
 int _soundRewind(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     HRESULT hr;
 
     if (!gSoundInitialized) {
@@ -713,11 +733,16 @@ int _soundRewind(Sound* sound)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AD5C8
 int _addSoundData(Sound* sound, unsigned char* buf, int size)
 {
+#ifdef HAVE_DSOUND
     HRESULT hr;
     void* audio_ptr_1;
     DWORD audio_bytes_1;
@@ -749,11 +774,16 @@ int _addSoundData(Sound* sound, unsigned char* buf, int size)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AD6C0
 int _soundSetData(Sound* sound, unsigned char* buf, int size)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return gSoundLastError;
@@ -774,11 +804,16 @@ int _soundSetData(Sound* sound, unsigned char* buf, int size)
     }
 
     return _addSoundData(sound, buf, size);
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AD73C
 int soundPlay(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     HRESULT hr;
     DWORD readPos;
     DWORD writePos;
@@ -816,11 +851,16 @@ int soundPlay(Sound* sound)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AD828
 int soundStop(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     HRESULT hr;
 
     if (!gSoundInitialized) {
@@ -849,6 +889,10 @@ int soundStop(Sound* sound)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AD8DC
@@ -878,6 +922,7 @@ int soundDelete(Sound* sample)
 // 0x4AD948
 int soundContinue(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     HRESULT hr;
     DWORD status;
 
@@ -942,11 +987,16 @@ int soundContinue(Sound* sound)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4ADA84
 bool soundIsPlaying(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return false;
@@ -958,11 +1008,16 @@ bool soundIsPlaying(Sound* sound)
     }
 
     return (sound->field_40 & SOUND_FLAG_SOUND_IS_PLAYING) != 0;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return false;
+#endif
 }
 
 // 0x4ADAC4
 bool _soundDone(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return false;
@@ -974,11 +1029,16 @@ bool _soundDone(Sound* sound)
     }
 
     return sound->field_40 & 1;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return false;
+#endif
 }
 
 // 0x4ADB44
 bool soundIsPaused(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return false;
@@ -990,11 +1050,16 @@ bool soundIsPaused(Sound* sound)
     }
 
     return (sound->field_40 & SOUND_FLAG_SOUND_IS_PAUSED) != 0;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return false;
+#endif
 }
 
 // 0x4ADBC4
 int _soundType(Sound* sound, int a2)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return 0;
@@ -1006,11 +1071,16 @@ int _soundType(Sound* sound, int a2)
     }
 
     return sound->field_44 & a2;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return 0;
+#endif
 }
 
 // 0x4ADC04
 int soundGetDuration(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return gSoundLastError;
@@ -1030,6 +1100,10 @@ int soundGetDuration(Sound* sound)
     }
 
     return result;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4ADD00
@@ -1083,6 +1157,7 @@ int _soundVolumeHMItoDirectSound(int volume)
 // 0x4ADE0C
 int soundSetVolume(Sound* sound, int volume)
 {
+#ifdef HAVE_DSOUND
     int normalizedVolume;
     HRESULT hr;
 
@@ -1113,11 +1188,16 @@ int soundSetVolume(Sound* sound, int volume)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4ADE80
 int _soundGetVolume(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     long volume;
     int v13;
     int v8;
@@ -1150,6 +1230,10 @@ int _soundGetVolume(Sound* sound)
     }
 
     return sound->volume;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4ADFF0
@@ -1175,6 +1259,7 @@ int soundSetCallback(Sound* sound, SoundCallback* callback, void* userData)
 // 0x4AE02C
 int soundSetChannels(Sound* sound, int channels)
 {
+#ifdef HAVE_DSOUND
     LPWAVEFORMATEX format;
 
     if (!gSoundInitialized) {
@@ -1197,6 +1282,10 @@ int soundSetChannels(Sound* sound, int channels)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AE0B0
@@ -1223,6 +1312,7 @@ int soundSetReadLimit(Sound* sound, int readLimit)
 // 0x4AE0E4
 int soundPause(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     HRESULT hr;
     DWORD readPos;
     DWORD writePos;
@@ -1262,6 +1352,10 @@ int soundPause(Sound* sound)
     sound->field_40 |= SOUND_FLAG_SOUND_IS_PAUSED;
 
     return soundStop(sound);
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // TODO: Check, looks like it uses couple of inlined functions.
@@ -1269,6 +1363,7 @@ int soundPause(Sound* sound)
 // 0x4AE1F0
 int soundResume(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     HRESULT hr;
 
     if (!gSoundInitialized) {
@@ -1301,6 +1396,10 @@ int soundResume(Sound* sound)
     sound->field_48 = 0;
 
     return soundPlay(sound);
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AE2FC
@@ -1351,6 +1450,7 @@ int soundSetFileIO(Sound* sound, SoundOpenProc* openProc, SoundCloseProc* closeP
 // 0x4AE378
 void soundDeleteInternal(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     STRUCT_51D478* curr;
     Sound* v10;
     Sound* v11;
@@ -1409,6 +1509,7 @@ void soundDeleteInternal(Sound* sound)
     }
 
     gSoundFreeProc(sound);
+#endif
 }
 
 // 0x4AE578
@@ -1454,6 +1555,7 @@ void _removeTimedEvent(unsigned int* timerId)
 // 0x4AE634
 int _soundGetPosition(Sound* sound)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return gSoundLastError;
@@ -1477,11 +1579,16 @@ int _soundGetPosition(Sound* sound)
     }
 
     return playPos;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AE6CC
 int _soundSetPosition(Sound* sound, int a2)
 {
+#ifdef HAVE_DSOUND
     if (!gSoundInitialized) {
         gSoundLastError = SOUND_NOT_INITIALIZED;
         return gSoundLastError;
@@ -1529,6 +1636,10 @@ int _soundSetPosition(Sound* sound, int a2)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AE830
@@ -1613,6 +1724,7 @@ void _fadeSounds()
 // 0x4AE988
 int _internalSoundFade(Sound* sound, int a2, int a3, int a4)
 {
+#ifdef HAVE_DSOUND
     STRUCT_51D478* ptr;
 
     if (!_deviceInit) {
@@ -1701,6 +1813,10 @@ int _internalSoundFade(Sound* sound, int a2, int a3, int a4)
 
     gSoundLastError = SOUND_NO_ERROR;
     return gSoundLastError;
+#else
+    gSoundLastError = SOUND_NOT_IMPLEMENTED;
+    return gSoundLastError;
+#endif
 }
 
 // 0x4AEB0C
diff --git a/src/sound.h b/src/sound.h
index 3e5f781..caf1d45 100644
--- a/src/sound.h
+++ b/src/sound.h
@@ -44,6 +44,8 @@ typedef enum SoundError {
     SOUND_INVALID_HANDLE = 30,
     SOUND_NO_MEMORY_AVAILABLE = 31,
     SOUND_UNKNOWN_ERROR = 32,
+    // TODO: Remove once DirectX -> SDL transition is completed.
+    SOUND_NOT_IMPLEMENTED = 33,
     SOUND_ERR_COUNT,
 } SoundError;
 
@@ -72,8 +74,10 @@ typedef void SoundCallback(void* userData, int a2);
 typedef struct Sound {
     SoundFileIO io;
     unsigned char* field_20;
+#ifdef HAVE_DSOUND
     LPDIRECTSOUNDBUFFER directSoundBuffer;
     DSBUFFERDESC directSoundBufferDescription;
+#endif
     int field_3C;
     // flags
     int field_40;
@@ -128,7 +132,9 @@ extern const char* gSoundErrorDescriptions[SOUND_ERR_COUNT];
 
 extern int gSoundLastError;
 extern int _masterVol;
+#ifdef HAVE_DSOUND
 extern LPDIRECTSOUNDBUFFER gDirectSoundPrimaryBuffer;
+#endif
 extern int _sampleRate;
 extern int _numSounds;
 extern int _deviceInit;
@@ -136,7 +142,9 @@ extern int _dataSize;
 extern int _numBuffers;
 extern bool gSoundInitialized;
 extern Sound* gSoundListHead;
+#ifdef HAVE_DSOUND
 extern LPDIRECTSOUND gDirectSound;
+#endif
 
 void* soundMallocProcDefaultImpl(size_t size);
 void* soundReallocProcDefaultImpl(void* ptr, size_t size);
diff --git a/src/win32.cc b/src/win32.cc
index c72c894..5e55a10 100644
--- a/src/win32.cc
+++ b/src/win32.cc
@@ -5,9 +5,12 @@
 #include "window_manager.h"
 
 #include <SDL.h>
+#include <stdlib.h>
 
+#ifdef HAVE_DSOUND
 // 0x51E430
 DirectSoundCreateProc* gDirectSoundCreateProc = NULL;
+#endif
 
 // 0x51E434
 HWND gProgramWindow = NULL;
@@ -18,8 +21,10 @@ bool gProgramIsActive = false;
 // GNW95MUTEX
 HANDLE _GNW95_mutex = NULL;
 
+#ifdef HAVE_DSOUND
 // 0x51E454
 HMODULE gDSoundDLL = NULL;
+#endif
 
 // 0x4DE700
 int main(int argc, char* argv[])
@@ -39,6 +44,7 @@ int main(int argc, char* argv[])
 // 0x4DE8D0
 bool _LoadDirectX()
 {
+#ifdef HAVE_DSOUND
     gDSoundDLL = LoadLibraryA("DSOUND.DLL");
     if (gDSoundDLL == NULL) {
         goto err;
@@ -48,6 +54,7 @@ bool _LoadDirectX()
     if (gDirectSoundCreateProc == NULL) {
         goto err;
     }
+#endif
 
     atexit(_UnloadDirectX);
 
@@ -55,7 +62,7 @@ bool _LoadDirectX()
 
 err:
     _UnloadDirectX();
-    
+
     SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Could not load DirectX", "This program requires DirectX 3.0a or later.", NULL);
 
     return false;
@@ -64,8 +71,10 @@ err:
 // 0x4DE988
 void _UnloadDirectX(void)
 {
+#ifdef HAVE_DSOUND
     if (gDSoundDLL != NULL) {
         FreeLibrary(gDSoundDLL);
         gDSoundDLL = NULL;
     }
+#endif
 }
diff --git a/src/win32.h b/src/win32.h
index 45056cd..d44564d 100644
--- a/src/win32.h
+++ b/src/win32.h
@@ -1,23 +1,25 @@
 #ifndef WIN32_H
 #define WIN32_H
 
+#include "dsound_compat.h"
+
 #define WIN32_LEAN_AND_MEAN
 #define NOMINMAX
 #include <windows.h>
 
-#include <mmreg.h>
-
-#define DIRECTSOUND_VERSION 0x0300
-#include <dsound.h>
-
+#ifdef HAVE_DSOUND
 typedef HRESULT(__stdcall DirectSoundCreateProc)(GUID*, LPDIRECTSOUND*, IUnknown*);
+#endif
 
+#ifdef HAVE_DSOUND
 extern DirectSoundCreateProc* gDirectSoundCreateProc;
+#endif
 extern HWND gProgramWindow;
 extern bool gProgramIsActive;
 extern HANDLE _GNW95_mutex;
+#ifdef HAVE_DSOUND
 extern HMODULE gDSoundDLL;
-
+#endif
 bool _LoadDirectX();
 void _UnloadDirectX(void);