diff --git a/sc2/src/sc2code/libs/sound/mixsdl/sound_mixsdl.c b/sc2/src/sc2code/libs/sound/mixsdl/sound_mixsdl.c
index 13cfb34c3..c2ef40a02 100644
--- a/sc2/src/sc2code/libs/sound/mixsdl/sound_mixsdl.c
+++ b/sc2/src/sc2code/libs/sound/mixsdl/sound_mixsdl.c
@@ -153,7 +153,11 @@ TFB_mixSDL_UninitSound (void)
 {
 	int i;
 
-	ConcludeTask (StreamDecoderTask);
+	if (StreamDecoderTask)
+	{
+		ConcludeTask (StreamDecoderTask);
+		StreamDecoderTask = NULL;
+	}
 
 	for (i = 0; i < NUM_SOUNDSOURCES; ++i)
 	{