diff --git a/widget/cocoa/nsCocoaWindow.mm b/widget/cocoa/nsCocoaWindow.mm
index 225815aca04da2298605a732b25a3ebe17c109bf..3dcf1dfc5cf6c76380c41c37b778bc4160720960 100644
--- a/widget/cocoa/nsCocoaWindow.mm
+++ b/widget/cocoa/nsCocoaWindow.mm
@@ -7380,7 +7380,7 @@ static NSMutableSet* gSwizzledFrameViewClasses = nil;
 
 // Returns an autoreleased NSImage.
 static NSImage* GetMenuMaskImage() {
-  const CGFloat radius = 6.0f;
+  const CGFloat radius = 10.0f;
   const NSSize maskSize = {radius * 3.0f, radius * 3.0f};
   NSImage* maskImage = [NSImage imageWithSize:maskSize
                                       flipped:FALSE
