diff --git a/lib/ace/mode/css.js b/lib/ace/mode/css.js
index 447a8181..cd66d37f 100644
--- a/lib/ace/mode/css.js
+++ b/lib/ace/mode/css.js
@@ -37,11 +37,13 @@ var Tokenizer = require("../tokenizer").Tokenizer;
 var CssHighlightRules = require("./css_highlight_rules").CssHighlightRules;
 var MatchingBraceOutdent = require("./matching_brace_outdent").MatchingBraceOutdent;
 var WorkerClient = require("../worker/worker_client").WorkerClient;
+var CstyleBehaviour = require("./behaviour/cstyle").CstyleBehaviour;
 var CStyleFoldMode = require("./folding/cstyle").FoldMode;
 
 var Mode = function() {
     this.$tokenizer = new Tokenizer(new CssHighlightRules().getRules(), "i");
     this.$outdent = new MatchingBraceOutdent();
+    this.$behaviour = new CstyleBehaviour();
     this.foldingRules = new CStyleFoldMode();
 };
 oop.inherits(Mode, TextMode);