diff --git a/lib/ace/mode/ruby.js b/lib/ace/mode/ruby.js
index 708508f8..7d66179e 100644
--- a/lib/ace/mode/ruby.js
+++ b/lib/ace/mode/ruby.js
@@ -37,10 +37,12 @@ var Tokenizer = require("../tokenizer").Tokenizer;
 var RubyHighlightRules = require("./ruby_highlight_rules").RubyHighlightRules;
 var MatchingBraceOutdent = require("./matching_brace_outdent").MatchingBraceOutdent;
 var Range = require("../range").Range;
+var FoldMode = require("./folding/coffee").FoldMode;
 
 var Mode = function() {
     this.$tokenizer = new Tokenizer(new RubyHighlightRules().getRules());
     this.$outdent = new MatchingBraceOutdent();
+    this.foldingRules = new FoldMode();
 };
 oop.inherits(Mode, TextMode);