diff --git a/toolkit/components/feeds/FeedProcessor.js b/toolkit/components/feeds/FeedProcessor.js
index 88d0ad6ed7..51b6b13c93 100644
--- a/toolkit/components/feeds/FeedProcessor.js
+++ b/toolkit/components/feeds/FeedProcessor.js
@@ -637,7 +637,8 @@ TextConstruct.prototype = {
     else
       return null;
 
-    return this.parserUtils.parseFragment(this.text, 0, isXML,
+    let flags = Ci.nsIParserUtils.SanitizerDropForms;
+    return this.parserUtils.parseFragment(this.text, flags, isXML,
                                           this.base, element);
   },