diff --git a/Lib/optparse.py b/Lib/optparse.py
index f8f643d..e1c675a 100644
--- a/Lib/optparse.py
+++ b/Lib/optparse.py
@@ -1376,7 +1376,7 @@
 
         try:
             stop = self._process_args(largs, rargs, values)
-        except (BadOptionError, OptionValueError), err:
+        except (BadOptionError, OptionValueError) as err:
             self.error(str(err))
 
         args = largs + rargs