--- a/mercurial/util.py	Sun Dec 10 16:24:21 2006 +0100
+++ b/mercurial/util.py	Sun Dec 10 19:41:57 2006 +0100
@@ -902,7 +902,7 @@
         The return value of a util.fstat(f) may be passed as the st argument.
         """
         if st is None:
-            st = fstat(f)
+            st = fstat(fp)
         return st.st_uid == os.getuid()
 
 def _buildencodefun():