diff --git a/pkg/varlog/operations.go b/pkg/varlog/operations.go
index 5e41f939a..1d7495417 100644
--- a/pkg/varlog/operations.go
+++ b/pkg/varlog/operations.go
@@ -74,7 +74,7 @@ RETRY:
 
 		for idx := 0; idx < len(res); idx++ {
 			if len(res[idx].Error) > 0 {
-				if strings.Contains(err.Error(), "sealed") {
+				if strings.Contains(res[idx].Error, "sealed") {
 					result.Err = fmt.Errorf("append: %s: %w", res[idx].Error, verrors.ErrSealed)
 				} else {
 					result.Err = fmt.Errorf("append: %s", res[idx].Error)