diff --git a/Lib/warnings.py b/Lib/warnings.py
index b7fac69..c0a96d6 100644
--- a/Lib/warnings.py
+++ b/Lib/warnings.py
@@ -192,7 +192,7 @@
     for arg in args:
         try:
             _setoption(arg)
-        except _OptionError, msg:
+        except _OptionError as msg:
             print >>sys.stderr, "Invalid -W option ignored:", msg
 
 # Helper for _processoptions()