diff --git a/src/gba/supervisor/thread.c b/src/gba/supervisor/thread.c
index e72f31f18..59c9c366e 100644
--- a/src/gba/supervisor/thread.c
+++ b/src/gba/supervisor/thread.c
@@ -238,9 +238,9 @@ static THREAD_ENTRY _GBAThreadRun(void* context) {
 		threadContext->volume = GBA_AUDIO_VOLUME_MAX;
 	}
 	if (threadContext->mute) {
-		gba.audio.volume = 0;
+		gba.audio.masterVolume = 0;
 	} else {
-		gba.audio.volume = threadContext->volume;
+		gba.audio.masterVolume = threadContext->volume;
 	}
 
 	gba.keySource = &threadContext->activeKeys;