1 files changed, 1 insertions, 1 deletions
diff --git a/cmd2.py b/cmd2.py
index 5dee1fd..bf98652 100755
--- a/cmd2.py
+++ b/cmd2.py
@@ -69,7 +69,7 @@ class OptionParser(optparse.OptionParser):
         If you override this in a subclass, it should not return -- it
         should either exit or raise an exception.
         """
-        raise
+        raise optparse.OptParseError(msg)
         
 def remaining_args(oldArgs, newArgList):
     '''