diff --git a/Lib/timeit.py b/Lib/timeit.py
index a1a9b36..1d2bf08 100644
--- a/Lib/timeit.py
+++ b/Lib/timeit.py
@@ -126,7 +126,7 @@
             if isinstance(setup, basestring):
                 setup = reindent(setup, 4)
                 src = template % {'stmt': stmt, 'setup': setup}
-            elif callable(setup):
+            elif hasattr(setup, '__call__'):
                 src = template % {'stmt': stmt, 'setup': '_setup()'}
                 ns['_setup'] = setup
             else:
@@ -135,13 +135,13 @@
             code = compile(src, dummy_src_name, "exec")
             exec(code, globals(), ns)
             self.inner = ns["inner"]
-        elif callable(stmt):
+        elif hasattr(stmt, '__call__'):
             self.src = None
             if isinstance(setup, basestring):
                 _setup = setup
                 def setup():
                     exec(_setup, globals(), ns)
-            elif not callable(setup):
+            elif not hasattr(setup, '__call__'):
                 raise ValueError("setup is neither a string nor callable")
             self.inner = _template_func(setup, stmt)
         else: