diff --git a/lib/ace/mode/ruby.js b/lib/ace/mode/ruby.js
index 1c6d63f6..073fa070 100644
--- a/lib/ace/mode/ruby.js
+++ b/lib/ace/mode/ruby.js
@@ -75,7 +75,7 @@ oop.inherits(Mode, TextMode);
     };
 
     this.checkOutdent = function(state, line, input) {
-        return /\s+end$/.test(line + input) || /\s+}$/.test(line + input) || /\s+else$/.test(line + input);
+        return /^\s+end$/.test(line + input) || /^\s+}$/.test(line + input) || /^\s+else$/.test(line + input);
     };
 
     this.autoOutdent = function(state, doc, row) {