diff --git a/widget/src/cocoa/nsNativeScrollbar.mm b/widget/src/cocoa/nsNativeScrollbar.mm
index 88bf489aa986..d68b4c148525 100644
--- a/widget/src/cocoa/nsNativeScrollbar.mm
+++ b/widget/src/cocoa/nsNativeScrollbar.mm
@@ -500,7 +500,7 @@ nsNativeScrollbar::UpdateScroller()
   BOOL enableScrollbar = (mIsEnabled && (mMaxValue > 0));
   [scrollbarView setEnabled:enableScrollbar];
   
-  [scrollbarView setNeedsDisplay:YES];
+  Invalidate(FALSE);
 }