diff --git a/demo/kitchen-sink/demo.js b/demo/kitchen-sink/demo.js
index f8ab0add..f33dbcaf 100644
--- a/demo/kitchen-sink/demo.js
+++ b/demo/kitchen-sink/demo.js
@@ -370,6 +370,7 @@ bindDropdown("fontsize", function(value) {
 
 bindDropdown("folding", function(value) {
     env.editor.getSession().setFoldStyle(value);
+    env.editor.setShowFoldWidgets(value !== "manual");
 });
 
 bindDropdown("soft_wrap", function(value) {