diff --git a/docs/backend-system/building-backends/08-migrating.md b/docs/backend-system/building-backends/08-migrating.md
index 6dcf17431e..9216192cb9 100644
--- a/docs/backend-system/building-backends/08-migrating.md
+++ b/docs/backend-system/building-backends/08-migrating.md
@@ -1199,7 +1199,7 @@ class ExampleAllowAllPermissionPolicy implements PermissionPolicy {
 
 const customPermissionBackendModule = createBackendModule({
   pluginId: 'permission',
-  moduleId: 'allow-all-policy',
+  moduleId: 'custom-policy',
   register(reg) {
     reg.registerInit({
       deps: { policy: policyExtensionPoint },