diff --git a/external_api.js b/external_api.js
index 968d1debe1..a46209d667 100644
--- a/external_api.js
+++ b/external_api.js
@@ -48,7 +48,7 @@ var JitsiMeetExternalAPI = (function()
         this.iframeHolder.style.width = width + "px";
         this.iframeHolder.style.height = height + "px";
         this.frameName = "jitsiConferenceFrame" + JitsiMeetExternalAPI.id;
-        this.url = "http://" + domain + "/";
+        this.url = "//" + domain + "/";
         if(room_name)
             this.url += room_name;
         this.url += "#external";