diff --git a/cmd/mccl/main.go b/cmd/mccl/main.go
index ddd911a..becde20 100755
--- a/cmd/mccl/main.go
+++ b/cmd/mccl/main.go
@@ -31,7 +31,7 @@ func main() {
 
 	if len(os.Args) < 2 {
 		usage()
-		os.Exit(0)
+		os.Exit(1)
 	}
 
 	var cmd commands.Command