diff --git a/app/assets/javascripts/index/directions/mapquest.js b/app/assets/javascripts/index/directions/mapquest.js
index 935a1ca4c..112d17bcb 100644
--- a/app/assets/javascripts/index/directions/mapquest.js
+++ b/app/assets/javascripts/index/directions/mapquest.js
@@ -28,7 +28,7 @@ function MapQuestEngine(id, vehicleParam) {
 
   return {
     id: id,
-    creditline: '<a href="http://www.mapquest.com/" target="_blank">MapQuest</a> <img src="http://developer.mapquest.com/content/osm/mq_logo.png">',
+    creditline: '<a href="http://www.mapquest.com/" target="_blank">MapQuest</a> <img src="' + document.location.protocol + '//developer.mapquest.com/content/osm/mq_logo.png">',
     draggable: false,
 
     getRoute: function (points, callback) {