diff --git a/templates/element-form/form-partials/checkbox.html.twig b/templates/element-form/form-partials/checkbox.html.twig
index 1d09fa90bfcf3b65ac3303761a7f27ca42aaf8fe..3682d6e4a4fd63eef80948c7152df2f8e2c40f39 100755
--- a/templates/element-form/form-partials/checkbox.html.twig
+++ b/templates/element-form/form-partials/checkbox.html.twig
@@ -1,7 +1,7 @@
 <div class="checkbox-container">
   <input type="checkbox" name="data[{{ field.name }}]" id="{{ field.name }}"
           {% if field.required|default(false) %}class="required"{% endif %}
-          data-checked-value="{{ field.checked_value }}"
+          data-checked-value="{{ field.checked_value|default('on') }}"
           {% if elementValue or not elementValue and field.defaultvalue == "yes" %}checked="checked"{% endif %}/>
   <label for="{{ field.name }}" class="to-html">{{ field.label|raw }}</label>
 </div>
\ No newline at end of file