diff --git a/AppKit/CPObjectController.j b/AppKit/CPObjectController.j
index 30a720848..b0e4d9b18 100644
--- a/AppKit/CPObjectController.j
+++ b/AppKit/CPObjectController.j
@@ -324,9 +324,9 @@ var CPObjectControllerContentKey                        = @"CPObjectControllerCo
 - (void)observeValueForKeyPath:(CPString)aKeyPath ofObject:(id)anObject change:(CPDictionary)change context:(id)context
 {
     if (_notifyObject)
-        [_object observeValueForKeyPath:_keyPath ofObject:_object change:change context:context];
+        [_object observeValueForKeyPath:aKeyPath ofObject:_object change:change context:context];
 
-    [_observer observeValueForKeyPath:_keyPath ofObject:_object change:change context:context];
+    [_observer observeValueForKeyPath:aKeyPath ofObject:_object change:change context:context];
 }
 
 - (CPString)description