diff --git a/lib/OpenLayers/Layer/Bing.js b/lib/OpenLayers/Layer/Bing.js
index cf064e17c7..761c000aa0 100644
--- a/lib/OpenLayers/Layer/Bing.js
+++ b/lib/OpenLayers/Layer/Bing.js
@@ -145,7 +145,7 @@ OpenLayers.Layer.Bing = OpenLayers.Class(OpenLayers.Layer.XYZ, {
             jsonp: this._callbackId,
             include: "ImageryProviders"
         }, this.metadataParams);
-        var url = "http://dev.virtualearth.net/REST/v1/Imagery/Metadata/" +
+        var url = "//dev.virtualearth.net/REST/v1/Imagery/Metadata/" +
             this.type + "?" + OpenLayers.Util.getParameterString(params);
         var script = document.createElement("script");
         script.type = "text/javascript";