diff --git a/lib/CLI.js b/lib/CLI.js
index a607470f..e0b43f40 100644
--- a/lib/CLI.js
+++ b/lib/CLI.js
@@ -169,7 +169,7 @@ CLI.startup = function(platform) {
       console.error(cst.PREFIX_MSG + 'You have to run this command as root');
       console.error(cst.PREFIX_MSG + 'Execute the following command :');
       if (platform === undefined) platform = '';
-      console.error(cst.PREFIX_MSG + 'sudo env PATH=$PATH:' + p.dirname(process.execPath) + ' pm2 startup ' + platform + '-u ' + stdout.trim());
+      console.error(cst.PREFIX_MSG + 'sudo env PATH=$PATH:' + p.dirname(process.execPath) + ' pm2 startup ' + platform + ' -u ' + stdout.trim());
       process.exit(cst.ERROR_EXIT);
     });
     return;