diff --git a/Foundation/CPArray.j b/Foundation/CPArray.j
index e10f8e8b0..70d33f9db 100755
--- a/Foundation/CPArray.j
+++ b/Foundation/CPArray.j
@@ -524,6 +524,7 @@
         index = -result-1;
 
     [self insertObject:anObject atIndex:index];
+    return index;
 }
 
 /*!