diff --git a/src/ruisapp/glue/macosx/glue.mm b/src/ruisapp/glue/macosx/glue.mm
index 9f7cf1f..eb062ce 100644
--- a/src/ruisapp/glue/macosx/glue.mm
+++ b/src/ruisapp/glue/macosx/glue.mm
@@ -68,6 +68,7 @@ -(void)initStuff;
 	CocoaWindow* windowObjectId;
 	NSOpenGLContext* openglContextId;
 
+	// TODO: use atomic
 	bool quitFlag = false;
 
 	bool mouseCursorIsCurrentlyVisible = true;