diff --git a/stepmania/src/arch/MovieTexture/MovieTexture_FFMpeg.cpp b/stepmania/src/arch/MovieTexture/MovieTexture_FFMpeg.cpp
index e0a5fe60e3..8c435ce45f 100644
--- a/stepmania/src/arch/MovieTexture/MovieTexture_FFMpeg.cpp
+++ b/stepmania/src/arch/MovieTexture/MovieTexture_FFMpeg.cpp
@@ -652,8 +652,8 @@ void MovieTexture_FFMpeg::DecoderThread()
 	/* Windows likes to boost priority when processes come out of a wait state.  We don't
 	 * want that, since it'll result in us having a small priority boost after each movie
 	 * frame, resulting in skips in the gameplay thread. */
-	if(!SetThreadPriorityBoost(GetCurrentThread(), TRUE))
-		LOG->Warn(werr_ssprintf(GetLastError(), "SetThreadPriorityBoost failed"));
+	if( !SetThreadPriorityBoost(GetCurrentThread(), TRUE) && GetLastError() != ERROR_NOT_SUPPORTED )
+		LOG->Warn( werr_ssprintf(GetLastError(), "SetThreadPriorityBoost failed") );
 #endif
 
 	CHECKPOINT;