diff --git a/AppKit/CPTabView.j b/AppKit/CPTabView.j
index 5a956805d..6aa303cae 100644
--- a/AppKit/CPTabView.j
+++ b/AppKit/CPTabView.j
@@ -39,7 +39,7 @@ var CPTabViewDidSelectTabViewItemSelector           = 1 << 1,
     CPTabViewDidChangeNumberOfTabViewItemsSelector  = 1 << 4;
 
 
-@protocol CPTabViewDelegate
+@protocol CPTabViewDelegate <CPObject>
 
 @optional
 - (BOOL)tabView:(CPTabView)tabView shouldSelectTabViewItem:(CPTabViewItem)tabViewItem;