diff --git a/law/cli/cli.py b/law/cli/cli.py
index 1567f176..08c2df2a 100644
--- a/law/cli/cli.py
+++ b/law/cli/cli.py
@@ -31,4 +31,7 @@ def run():
     else:
         args = parser.parse_args()
 
-    mods[args.command].execute(args)
+    if args.command:
+        mods[args.command].execute(args)
+    else:
+        parser.print_help()