diff --git a/lib/ace/mode/javascript_highlight_rules.js b/lib/ace/mode/javascript_highlight_rules.js
index 545e1d69..46306409 100644
--- a/lib/ace/mode/javascript_highlight_rules.js
+++ b/lib/ace/mode/javascript_highlight_rules.js
@@ -76,6 +76,10 @@ var JavaScriptHighlightRules = function() {
     // keywords which can be followed by regular expressions
     var kwBeforeRe = "case|do|else|finally|in|instanceof|return|throw|try|typeof|yield";
 
+    var deprecated = lang.arrayToMap(
+        ("__parent__|__count__|escape|unescape|with|__proto__").split("|")
+    );
+
     var buildinConstants = lang.arrayToMap(
         ("null|Infinity|NaN|undefined").split("|")
     );
@@ -143,6 +147,8 @@ var JavaScriptHighlightRules = function() {
                 token : function(value) {
                     if (globals.hasOwnProperty(value))
                         return "variable.language";
+                    else if (deprecated.hasOwnProperty(value))
+                        return "invalid.deprecated";
                     else if (keywords.hasOwnProperty(value))
                         return "keyword";
                     else if (buildinConstants.hasOwnProperty(value))