diff --git a/constants.js b/constants.js
index ad44e198..0e7944c9 100644
--- a/constants.js
+++ b/constants.js
@@ -12,8 +12,10 @@ var PM2_ROOT_PATH = '';
 
 if (process.env.PM2_HOME)
   PM2_ROOT_PATH = process.env.PM2_HOME;
-else
+else if (process.env.HOME || process.env.HOMEPATH)
   PM2_ROOT_PATH = p.resolve(process.env.HOME || process.env.HOMEPATH, '.pm2');
+else
+  PM2_ROOT_PATH = p.resolve('/etc', '.pm2');
 
 /**
  * Constants variables used by PM2