diff --git a/lms/templates/video.html b/lms/templates/video.html
index 9166894a10..9936b97b7d 100644
--- a/lms/templates/video.html
+++ b/lms/templates/video.html
@@ -161,7 +161,7 @@
   var cdnStartTime;
   var salt = Math.floor((1 + Math.random()) * 0x100000).toString(36);
   function initializeCDNExperiment() {
-    sendPerformanceBeacon("${id}", ${cdn_exp_group}, "", "load");
+    sendPerformanceBeacon("${id}_" + salt, ${cdn_exp_group}, "", "load");
     cdnStartTime = Date.now();
     $.each(['loadstart', 'abort', 'error', 'stalled', 'loadedmetadata',
                     'loadeddata', 'canplay', 'canplaythrough', 'seeked'],