diff --git a/packages/frontend/src/pages/admin/roles.vue b/packages/frontend/src/pages/admin/roles.vue
index 3c6b79e209..adf87f0656 100644
--- a/packages/frontend/src/pages/admin/roles.vue
+++ b/packages/frontend/src/pages/admin/roles.vue
@@ -434,6 +434,7 @@ function matchQuery(keywords: string[]): boolean {
 
 async function updateBaseRole() {
 	await os.apiWithDialog('admin/roles/update-default-policies', {
+		//@ts-expect-error misskey-js側の型定義が不十分
 		policies,
 	});
 	fetchInstance(true);