diff --git a/vendor/fbtransform/transforms/xjs.js b/vendor/fbtransform/transforms/xjs.js
index d1fe9117a7..efd0e35bd3 100644
--- a/vendor/fbtransform/transforms/xjs.js
+++ b/vendor/fbtransform/transforms/xjs.js
@@ -33,14 +33,14 @@ var knownTags = {
   base: true,
   bdi: true,
   bdo: true,
+  big: true,
   blockquote: true,
   body: true,
   br: true,
   button: true,
   canvas: true,
-  circle: true,
-  ellipse: true,
   caption: true,
+  circle: true,
   cite: true,
   code: true,
   col: true,
@@ -56,6 +56,7 @@ var knownTags = {
   div: true,
   dl: true,
   dt: true,
+  ellipse: true,
   em: true,
   embed: true,
   fieldset: true,
@@ -87,10 +88,12 @@ var knownTags = {
   li: true,
   line: true,
   link: true,
+  main: true,
   map: true,
   mark: true,
   marquee: true,
   menu: true,
+  menuitem: true,
   meta: true,
   meter: true,
   nav: true,
@@ -101,8 +104,9 @@ var knownTags = {
   option: true,
   output: true,
   p: true,
-  path: true,
   param: true,
+  path: true,
+  polyline: true,
   pre: true,
   progress: true,
   q: true,