diff --git a/lib/ace/mode/yaml_highlight_rules.js b/lib/ace/mode/yaml_highlight_rules.js
index cf946577..7bd9f453 100644
--- a/lib/ace/mode/yaml_highlight_rules.js
+++ b/lib/ace/mode/yaml_highlight_rules.js
@@ -86,9 +86,6 @@ var YamlHighlightRules = function() {
             }, {
                 token : "constant.language.boolean",
                 regex : "(?:true|false|TRUE|FALSE|True|False|yes|no)\\b"
-            }, {
-                token : "invalid.illegal", // comments are not allowed
-                regex : "\\/\\/.*$"
             }, {
                 token : "paren.lparen",
                 regex : "[[({]"