diff --git a/src/Squidex/app/features/schemas/pages/schema/types/boolean-validation.component.html b/src/Squidex/app/features/schemas/pages/schema/types/boolean-validation.component.html
index 756059efd..04cb9a3eb 100644
--- a/src/Squidex/app/features/schemas/pages/schema/types/boolean-validation.component.html
+++ b/src/Squidex/app/features/schemas/pages/schema/types/boolean-validation.component.html
@@ -11,7 +11,7 @@
         <label class="col col-3 col-form-checkbox-label" for="field-default-value">Default Value</label>
 
         <div class="col col-6">
-            <input type="checkbox" class="form-check-input" id="field-default-value" formControlName="defaultValue" indeterminate-value />
+            <input type="checkbox" class="form-check-input" id="field-default-value" formControlName="defaultValue" sqxIndeterminateValue />
         </div>
     </div>
 </div>
\ No newline at end of file