diff --git a/ccp/js/inputwidgeteditorcontroller.js b/ccp/js/inputwidgeteditorcontroller.js
index 1ce6d9b..6ded546 100644
--- a/ccp/js/inputwidgeteditorcontroller.js
+++ b/ccp/js/inputwidgeteditorcontroller.js
@@ -128,7 +128,7 @@ class CCPInputWidgetEditorController extends HTMLElement{
               <div class="col" title="Read only">
                 <label>Read only</label>
                 <div class="form-field">
-                  <input type="checkbox" value="${this.#input.schema.readOnly}" name="readonly" class="form-check-input">
+                  <input type="checkbox" checked="${this.#input.schema.readOnly}" name="readonly" class="form-check-input">
                 </div>
               </div>
             </div>