diff --git a/src/controllers/SalaryPeriodController.ts b/src/controllers/SalaryPeriodController.ts
index 4309007..80525af 100644
--- a/src/controllers/SalaryPeriodController.ts
+++ b/src/controllers/SalaryPeriodController.ts
@@ -1177,7 +1177,7 @@ export class SalaryPeriodController extends Controller {
     if (chk_period) {
       throw new HttpError(
         HttpStatusCode.NOT_FOUND,
-        "ประเภทผังปี " + salaryPeriod.effectiveDate.getFullYear() + " ซ้ำ",
+        "ประเภทผังปี " + Extension.ToThaiYear(salaryPeriod.effectiveDate.getFullYear()) + " ซ้ำ",
       );
     }