diff --git a/lib/ace/mode/JavaScriptHighlightRules.js b/lib/ace/mode/JavaScriptHighlightRules.js
index 7274715a..5552f7f9 100644
--- a/lib/ace/mode/JavaScriptHighlightRules.js
+++ b/lib/ace/mode/JavaScriptHighlightRules.js
@@ -27,10 +27,19 @@ JavaScriptHighlightRules = function() {
         ("true|false|null|undefined|Infinity|NaN|undefined").split("|")
     );
     
+    // ES3 future reserved
     var futureReserved = lang.arrayToMap(
-        ("class|enum|extends|super|const|export|import|implements|let|private|" +
-        "public|yield|interface|package|protected|static").split("|")
+        ("abstract|boolean|byte|char|class|const|enum|export|extends|final|" +
+        "float|goto|implements|int|interface|long|native|package|private|" +
+        "protected|short|static|super|synchronized|throws|transient|volatile" +
+        "double|import|public").split("|")
     );
+    
+// ES5 future reserved
+//    var futureReserved = lang.arrayToMap(
+//        ("class|enum|extends|super|const|export|import|implements|let|private|" +
+//        "public|yield|interface|package|protected|static").split("|")
+//    );
 
     // regexp must not have capturing parentheses. Use (?:) instead.
     // regexps are ordered -> the first match is used