diff --git a/lib/ace/mode/golang_highlight_rules.js b/lib/ace/mode/golang_highlight_rules.js
index b899057b..4b450055 100644
--- a/lib/ace/mode/golang_highlight_rules.js
+++ b/lib/ace/mode/golang_highlight_rules.js
@@ -13,7 +13,7 @@ define(function(require, exports, module) {
         );
 
         var buildinConstants = lang.arrayToMap(
-            ("nit|true|false|iota").split("|")
+            ("nil|true|false|iota").split("|")
         );
 
         this.$rules = {