diff --git a/src/controllers/branch/branch-controller.ts b/src/controllers/branch/branch-controller.ts
index 5eab1e7..1e12a87 100644
--- a/src/controllers/branch/branch-controller.ts
+++ b/src/controllers/branch/branch-controller.ts
@@ -156,7 +156,7 @@ export class BranchController extends Controller {
       },
       data: {
         ...rest,
-        isHeadOffice: headOfficeId === null,
+        isHeadOffice: !headOfficeId,
         province: { connect: provinceId ? { id: provinceId } : undefined },
         district: { connect: districtId ? { id: districtId } : undefined },
         subDistrict: { connect: subDistrictId ? { id: subDistrictId } : undefined },