diff --git a/gulpfile.js b/gulpfile.js
index 2c47f9caa4d..6c4fb3bf7b7 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -146,7 +146,8 @@ function makeIE11Polyfill () {
     'es6.string.includes',
     'es6.string.starts-with',
     'es6.symbol',
-    'es6.map'
+    'es6.map',
+    'es6.number'
   ]
 
   return coreJsBuilder({