diff --git a/src/osx/cocoa/listbox.mm b/src/osx/cocoa/listbox.mm
index 44b5e50b61..cad11b0f2e 100644
--- a/src/osx/cocoa/listbox.mm
+++ b/src/osx/cocoa/listbox.mm
@@ -129,7 +129,7 @@ public :
 
     virtual void            ListScrollTo( unsigned int n ) wxOVERRIDE ;
 
-    virtual int             ListGetTopItem() conswxOVERRIDE t;
+    virtual int             ListGetTopItem() const wxOVERRIDE;
 
     // accessing content