diff --git a/2-ui/1-document/8-dom-polyfill/1-polyfill-matches/solution.md b/2-ui/1-document/8-dom-polyfill/1-polyfill-matches/solution.md
index c54770de..b1476536 100644
--- a/2-ui/1-document/8-dom-polyfill/1-polyfill-matches/solution.md
+++ b/2-ui/1-document/8-dom-polyfill/1-polyfill-matches/solution.md
@@ -12,7 +12,7 @@
     Element.prototype.matches = Element.prototype.matchesSelector ||
       Element.prototype.webkitMatchesSelector ||
       Element.prototype.mozMatchesSelector ||
-      Element.prototype.msMatchesSelector,
+      Element.prototype.msMatchesSelector;
 
   }