diff --git a/src/python/m5/main.py b/src/python/m5/main.py
index 54c54c1d5..afe73d94c 100644
--- a/src/python/m5/main.py
+++ b/src/python/m5/main.py
@@ -182,7 +182,7 @@ options = attrdict()
 arguments = []
 
 def usage(exitcode=None):
-    print parser.help
+    parser.print_help()
     if exitcode is not None:
         sys.exit(exitcode)