diff --git a/mercurial/manifest.py b/mercurial/manifest.py
--- a/mercurial/manifest.py
+++ b/mercurial/manifest.py
@@ -810,7 +810,7 @@
             if p in self._files:
                 yield self._subpath(p)
             else:
-                for f in self._dirs[p].iterkeys():
+                for f in self._dirs[p]:
                     yield f
 
     def keys(self):