diff --git a/src/controllers/SalaryController.ts b/src/controllers/SalaryController.ts
index 1de3343..90b72c7 100644
--- a/src/controllers/SalaryController.ts
+++ b/src/controllers/SalaryController.ts
@@ -190,7 +190,7 @@ export class SalaryController extends Controller {
         item.lastUpdateFullName = request.user.name;
         item.lastUpdatedAt = new Date();
         await this.salaryRepository.save(chk_fields, { data: request });
-        setLogDataDiff(request, { before, after: request });
+        setLogDataDiff(request, { before, after: chk_fields });
       });
     }
 
diff --git a/src/interfaces/utils.ts b/src/interfaces/utils.ts
index c5f6bf8..30035f0 100644
--- a/src/interfaces/utils.ts
+++ b/src/interfaces/utils.ts
@@ -20,8 +20,8 @@ export type LogSequence = {
 
 export function setLogDataDiff(req: RequestWithUser, data: DataDiff) {
   req.app.locals.logData.dataDiff = {
-    before: data.before ? JSON.stringify(data.before) : "",
-    after: data.after ? JSON.stringify(data.after) : "",
+    before: JSON.stringify(data.before),
+    after: JSON.stringify(data.after),
   };
 }