--- a/mercurial/commands.py	Sun Jul 15 14:43:38 2007 -0500
+++ b/mercurial/commands.py	Tue Jul 17 09:08:29 2007 -0300
@@ -1978,7 +1978,10 @@
     """
     rev = opts.get('rev')
     if file_:
-        ctx = repo.filectx(file_, changeid=rev)
+        files, match, anypats = cmdutil.matchpats(repo, (file_,), opts)
+        if anypats or len(files) != 1:
+            raise util.Abort(_('can only specify an explicit file name'))
+        ctx = repo.filectx(files[0], changeid=rev)
     elif rev:
         ctx = repo.changectx(rev)
     else: