diff --git a/lib/API.js b/lib/API.js
index fa147e6bf..1d71c2fb0 100644
--- a/lib/API.js
+++ b/lib/API.js
@@ -652,7 +652,7 @@ class API {
     /**
      * If -w option, write configuration to configuration.json file
      */
-    if (appConf.write) {
+    if (app_conf.write) {
       var dst_path = path.join(process.env.PWD || process.cwd(), app_conf.name + '-pm2.json');
       Common.printOut(conf.PREFIX_MSG + 'Writing configuration to', chalk.blue(dst_path));
       // pretty JSON