diff --git a/Lib/re.py b/Lib/re.py
index 1d9c987..ee962bb 100644
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -316,7 +316,7 @@
             if i == j:
                 break
             action = self.lexicon[m.lastindex-1][1]
-            if callable(action):
+            if hasattr(action, '__call__'):
                 self.match = m
                 action = action(self, m.group())
             if action is not None: