diff --git a/docs/index.js b/docs/index.js
index 2e0e44b..646b9f8 100644
--- a/docs/index.js
+++ b/docs/index.js
@@ -27,7 +27,7 @@ codeAstOptimized.setOptions({
 })
 codeAstOptimized.renderer.$cursorLayer.element.style.opacity=0;
 
-$('#opt_mode').val(localStorage.getItem('optimazationMode'));
+$('#opt_mode').val(localStorage.getItem('optimazationMode') || 'all');
 $('#opt_rules').val(localStorage.getItem('optimazationRules'));
 
 function generateErrorListHTML(errors) {