diff --git a/internal/data/mixrepoimpl/cmb.go b/internal/data/mixrepoimpl/cmb.go
index 2e7f3fb..8adf028 100644
--- a/internal/data/mixrepoimpl/cmb.go
+++ b/internal/data/mixrepoimpl/cmb.go
@@ -160,12 +160,12 @@ func (s *CmbMixRepoImpl) GetRequest(_ context.Context, reqBo *bo.CmbRequestBo) (
 
 	str := fmt.Sprintf("%s?%s", reqBo.FuncName, cmb.SortStructStr(req))
 
-	sing, err := cmb.SignBody(str, s.bc.Cmb.Sm2Prk)
+	sign, err := cmb.SignBody(str, s.bc.Cmb.Sm2Prk)
 	if err != nil {
 		return nil, err
 	}
 
-	req.Sign = sing
+	req.Sign = sign
 
 	return req, nil
 }