diff --git a/src/node/db/AuthorManager.js b/src/node/db/AuthorManager.js
index 667e0605d..5ba608e98 100644
--- a/src/node/db/AuthorManager.js
+++ b/src/node/db/AuthorManager.js
@@ -22,6 +22,7 @@
 var ERR = require("async-stacktrace");
 var db = require("./DB").db;
 var async = require("async");
+var customError = require("../utils/customError");
 var randomString = require('ep_etherpad-lite/static/js/pad_utils').randomString;
 
 exports.getColorPalette = function(){
@@ -272,4 +273,4 @@ exports.removePad = function (authorID, padID)
       db.set("globalAuthor:" + authorID, author);
     }
   });
-}
\ No newline at end of file
+}