diff --git a/nkd.go b/nkd.go
index 7bf9ef2922cf3539844c748d9febcc845511cf5f..a9df9077cf21b5d708252b48807c989cb4da71a7 100755
--- a/nkd.go
+++ b/nkd.go
@@ -31,6 +31,8 @@ import (
 func main() {
 	rootCmd := newRootCmd()
 
+	rootCmd.CompletionOptions.DisableDefaultCmd = true
+
 	for _, subCmd := range []*cobra.Command{
 		cmd.NewDeployCommand(),
 		cmd.NewDestroyCommand(),