diff --git a/src/controllers/ApiManageController.ts b/src/controllers/ApiManageController.ts
index a84c122e..01a27eb5 100644
--- a/src/controllers/ApiManageController.ts
+++ b/src/controllers/ApiManageController.ts
@@ -401,7 +401,7 @@ export class ApiManageController extends Controller {
     @Query("page") page: number = 1,
     @Query("pageSize") pageSize: number = this.DEFAULT_PAGE_SIZE,
     @Query("keyword") keyword: string = "",
-    @Query("system") system: SystemCode | undefined = undefined,
+    @Query("system") system: SystemCode | "" = "",
     @Query("isActive") isActive: boolean = true,
   ): Promise<HttpSuccess | HttpError> {
     try {