diff --git a/lib/ace/mode/javascript_highlight_rules.js b/lib/ace/mode/javascript_highlight_rules.js
index bad7e526..33844e55 100644
--- a/lib/ace/mode/javascript_highlight_rules.js
+++ b/lib/ace/mode/javascript_highlight_rules.js
@@ -70,7 +70,7 @@ var JavaScriptHighlightRules = function() {
     var kwBeforeRe = "case|do|else|finally|in|instanceof|return|throw|try|typeof|yield";
 
     // TODO: Unicode escape sequences
-    var identifierRe = "[a-zA-Z\\$_\u00a1-\uffff][a-zA-Z\d\\$_\u00a1-\uffff]*\\b";
+    var identifierRe = "[a-zA-Z\\$_\u00a1-\uffff][a-zA-Z\\d\\$_\u00a1-\uffff]*\\b";
 
     var escapedRe = "\\\\(?:x[0-9a-fA-F]{2}|" + // hex
         "u[0-9a-fA-F]{4}|" + // unicode