diff --git a/src/osx/cocoa/nonownedwnd.mm b/src/osx/cocoa/nonownedwnd.mm
index 73d60292d3..e8431e76a8 100644
--- a/src/osx/cocoa/nonownedwnd.mm
+++ b/src/osx/cocoa/nonownedwnd.mm
@@ -381,6 +381,8 @@ long style, long extraStyle, const wxString& name )
 
     [m_macWindow setDelegate:controller];
     
+    [m_macWindow setAcceptsMouseMovedEvents: YES];
+    
     // [m_macWindow makeKeyAndOrderFront:nil];
 }