diff --git a/poky/bitbake/lib/bb/COW.py b/poky/bitbake/lib/bb/COW.py
index bec6208..7817473 100644
--- a/poky/bitbake/lib/bb/COW.py
+++ b/poky/bitbake/lib/bb/COW.py
@@ -150,7 +150,7 @@
                 yield value
             if type == "items":
                 yield (key, value)
-        raise StopIteration()
+        return
 
     def iterkeys(cls):
         return cls.iter("keys")