diff --git a/mobile/chrome/content/browser.js b/mobile/chrome/content/browser.js
index 412ce8243a4..776f290d64e 100644
--- a/mobile/chrome/content/browser.js
+++ b/mobile/chrome/content/browser.js
@@ -753,7 +753,7 @@ var NativeWindow = {
       } else if (popupNode instanceof Ci.nsIImageLoadingContent && popupNode.currentURI) {
         title = popupNode.currentURI.spec;
       } else if (popupNode instanceof Ci.nsIDOMHTMLMediaElement) {
-        title = state.mediaURL = (popupNode.currentSrc || popupNode.src);
+        title = (popupNode.currentSrc || popupNode.src);
       }
 
       // convert this.menuitems object to an array for sending to native code