diff --git a/src/ol.js b/src/ol.js
index 44cfaca8f3..c35cd1c93a 100644
--- a/src/ol.js
+++ b/src/ol.js
@@ -2,6 +2,7 @@ goog.provide("ol");
 goog.require('ol.bounds');
 goog.require('ol.event');
 goog.require('ol.event.Events');
+goog.require('ol.event.drag');
 goog.require("ol.map");
 goog.require("ol.loc");
 goog.require("ol.projection");