diff --git a/index.html b/index.html
index 6c2edef..229d152 100644
--- a/index.html
+++ b/index.html
@@ -45,7 +45,7 @@
   <h2>Step2.5</h2>
   <p>Enter a sub folder name:</p>
   <div>
-    <textarea id="pathPrefix"></textarea>
+    <textarea id="pathPrefix" placeholder="Can be empty here"></textarea>
   </div>
 
   <h2>Step3</h2>