diff --git a/src/gba/gba-thread.h b/src/gba/gba-thread.h
index 32a711b96..142bc7a5e 100644
--- a/src/gba/gba-thread.h
+++ b/src/gba/gba-thread.h
@@ -27,14 +27,14 @@ enum ThreadState {
 
 struct GBASync {
 	int videoFramePending;
-	int videoFrameWait;
+	bool videoFrameWait;
 	int videoFrameSkip;
 	bool videoFrameOn;
 	Mutex videoFrameMutex;
 	Condition videoFrameAvailableCond;
 	Condition videoFrameRequiredCond;
 
-	int audioWait;
+	bool audioWait;
 	Condition audioRequiredCond;
 	Mutex audioBufferMutex;
 };
diff --git a/src/platform/sdl/gl-main.c b/src/platform/sdl/gl-main.c
index e9d50c4c6..be328272b 100644
--- a/src/platform/sdl/gl-main.c
+++ b/src/platform/sdl/gl-main.c
@@ -88,8 +88,8 @@ int main(int argc, char** argv) {
 		.audioBuffers = 512,
 		.startCallback = _GBASDLStart,
 		.cleanCallback = _GBASDLClean,
-		.sync.videoFrameWait = 0,
-		.sync.audioWait = 1,
+		.sync.videoFrameWait = false,
+		.sync.audioWait = true,
 		.userData = &renderer
 	};