diff --git a/apps/openmw/mwsound/soundmanager.cpp b/apps/openmw/mwsound/soundmanager.cpp
index 5b050e6121..7cd8f4ea79 100644
--- a/apps/openmw/mwsound/soundmanager.cpp
+++ b/apps/openmw/mwsound/soundmanager.cpp
@@ -23,6 +23,7 @@
    CMakeLists.txt.
 */
 #ifdef OPENMW_USE_FFMPEG
+#include "ffmpeg_decoder.hpp"
 #define SOUND_IN "FFmpeg"
 #endif