1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/optparse.py b/Lib/optparse.py
index ae48c7c..1fc07b5 100644
--- a/Lib/optparse.py
+++ b/Lib/optparse.py
@@ -700,7 +700,7 @@ class Option:
 
     def _check_callback(self):
         if self.action == "callback":
-            if not callable(self.callback):
+            if not hasattr(self.callback, '__call__'):
                 raise OptionError(
                     "callback not callable: %r" % self.callback, self)
             if (self.callback_args is not None and