diff --git a/src/socket.io/posts/edit.js b/src/socket.io/posts/edit.js
index 56cddd8c6b..41a7c1134f 100644
--- a/src/socket.io/posts/edit.js
+++ b/src/socket.io/posts/edit.js
@@ -2,6 +2,7 @@
 
 var async = require('async');
 var winston = require('winston');
+var validator = require('validator');
 
 var posts = require('../../posts');
 var groups = require('../../groups');