diff --git a/src/services/master/ThingController.ts b/src/services/master/ThingController.ts
index c9c78ad..1e2c316 100644
--- a/src/services/master/ThingController.ts
+++ b/src/services/master/ThingController.ts
@@ -17,7 +17,14 @@ export async function apiSearchThings(
   body: MasterModel.SearchPaginationBody,
   domain?: 'gms',
 ): Promise<GmsModel.GmsThingsResponse>;
-
+export async function apiSearchThings(
+  body: MasterModel.SearchPaginationBody,
+  domain?: string,
+): Promise<
+  | SpoleModel.SpoleThingsResponse
+  | SgwModel.SgwThingsResponse
+  | GmsModel.GmsThingsResponse
+>;
 export async function apiSearchThings(
   body: MasterModel.SearchPaginationBody,
   domain: string = process.env.DOMAIN_ENV || 'gms',