diff -r 4432e53578fd Lib/rlcompleter.py
--- a/Lib/rlcompleter.py	Sat Jul 05 22:59:18 2008 +0200
+++ b/Lib/rlcompleter.py	Sat Jul 05 23:16:35 2008 +0200
@@ -87,7 +87,7 @@ class Completer:
             return None
 
     def _callable_postfix(self, val, word):
-        if callable(val):
+        if hasattr(val, "__call__"):
             word = word + "("
         return word