diff --git a/lib/ace/mode/coffee_highlight_rules.js b/lib/ace/mode/coffee_highlight_rules.js
index 62200d97..c0aab565 100644
--- a/lib/ace/mode/coffee_highlight_rules.js
+++ b/lib/ace/mode/coffee_highlight_rules.js
@@ -133,6 +133,11 @@ define(function(require, exports, module) {
                 }, {
                     token : "comment",
                     regex : "#.*"
+                }, {
+                    token : [
+                        "punctuation.operator", "identifier"
+                    ],
+                    regex : "(\\.)(" + illegal + ")"
                 }, {
                     token : "punctuation.operator",
                     regex : "\\."