diff --git a/xCAT-server/lib/xcat/plugins/aixinstall.pm b/xCAT-server/lib/xcat/plugins/aixinstall.pm
index 9c64a1bad..31674274c 100644
--- a/xCAT-server/lib/xcat/plugins/aixinstall.pm
+++ b/xCAT-server/lib/xcat/plugins/aixinstall.pm
@@ -6464,7 +6464,7 @@ sub prenimnodeset
         {
             &nimnodeset_usage($callback);
         }
-        return;
+        return 1;
     }
 
     if ($::HELP)