diff --git a/lib/ace/mode/ruby.js b/lib/ace/mode/ruby.js
index c10ca247..7777cfaa 100644
--- a/lib/ace/mode/ruby.js
+++ b/lib/ace/mode/ruby.js
@@ -63,7 +63,7 @@ oop.inherits(Mode, TextMode);
 
         if (state == "start") {
             var match = line.match(/^.*[\{\(\[]\s*$/);
-            var startingClassOrMethod = line.match(/^\s*(class|def)\s.*$/);
+            var startingClassOrMethod = line.match(/^\s*(class|def|module)\s.*$/);
             var startingDoBlock = line.match(/.*do(\s*|\s+\|.*\|\s*)$/);
             var startingConditional = line.match(/^\s*(if|else)\s*/)
             if (match || startingClassOrMethod || startingDoBlock || startingConditional) {