diff --git a/griffin/griffin.c b/griffin/griffin.c
index 1d2b6c4721..b0c8bad693 100644
--- a/griffin/griffin.c
+++ b/griffin/griffin.c
@@ -39,6 +39,22 @@
 #endif
 #endif
 
+#if defined(_WIN32)
+#if defined(_MSC_VER) && _MSC_VER >= 1500
+
+#ifndef HAVE_MMAP_WIN32
+#define HAVE_MMAP_WIN32
+#endif
+
+#elif !defined(_MSC_VER)
+
+#ifndef HAVE_MMAP_WIN32
+#define HAVE_MMAP_WIN32
+#endif
+#endif
+
+#endif
+
 #define JSON_STATIC 1 /* must come before runtime_file, netplay_room_parse and jsonsax_full */
 
 #if _MSC_VER && !defined(__WINRT__)
@@ -1057,7 +1073,7 @@ FILE
 #if defined(HAVE_MMAP) && defined(BSD)
 #include "../libretro-common/file/nbio/nbio_unixmmap.c"
 #endif
-#if defined(_WIN32) && !defined(_XBOX)
+#if defined(HAVE_MMAP_WIN32)
 #include "../libretro-common/file/nbio/nbio_windowsmmap.c"
 #endif
 #if defined(ORBIS)
diff --git a/libretro-common/file/nbio/nbio_intf.c b/libretro-common/file/nbio/nbio_intf.c
index c4cebce6c8..111fbbc400 100644
--- a/libretro-common/file/nbio/nbio_intf.c
+++ b/libretro-common/file/nbio/nbio_intf.c
@@ -37,11 +37,27 @@ extern nbio_intf_t nbio_orbis;
 #endif
 extern nbio_intf_t nbio_stdio;
 
+#if defined(_WIN32)
+#if defined(_MSC_VER) && _MSC_VER >= 1500
+
+#ifndef HAVE_MMAP_WIN32
+#define HAVE_MMAP_WIN32
+#endif
+
+#elif !defined(_MSC_VER)
+
+#ifndef HAVE_MMAP_WIN32
+#define HAVE_MMAP_WIN32
+#endif
+#endif
+
+#endif
+
 #if defined(_linux__)
 static nbio_intf_t *internal_nbio = &nbio_linux;
 #elif defined(HAVE_MMAP) && defined(BSD)
 static nbio_intf_t *internal_nbio = &nbio_mmap_unix;
-#elif defined(_WIN32) && !defined(_XBOX)
+#elif defined(HAVE_MMAP_WIN32)
 static nbio_intf_t *internal_nbio = &nbio_mmap_win32;
 #elif defined(ORBIS)
 static nbio_intf_t *internal_nbio = &nbio_orbis;
diff --git a/libretro-common/file/nbio/nbio_windowsmmap.c b/libretro-common/file/nbio/nbio_windowsmmap.c
index c77274e563..ad172ffe59 100644
--- a/libretro-common/file/nbio/nbio_windowsmmap.c
+++ b/libretro-common/file/nbio/nbio_windowsmmap.c
@@ -22,7 +22,23 @@
 
 #include <file/nbio.h>
 
-#if defined(_WIN32) && !defined(_XBOX)
+#if defined(_WIN32)
+#if defined(_MSC_VER) && _MSC_VER >= 1500
+
+#ifndef HAVE_MMAP_WIN32
+#define HAVE_MMAP_WIN32
+#endif
+
+#elif !defined(_MSC_VER)
+
+#ifndef HAVE_MMAP_WIN32
+#define HAVE_MMAP_WIN32
+#endif
+#endif
+
+#endif
+
+#if defined(HAVE_MMAP_WIN32)
 
 #include <stdio.h>
 #include <stdlib.h>