diff --git a/internal/kv/rocksdb/rocksdb_kv.go b/internal/kv/rocksdb/rocksdb_kv.go
index 8eabcb511b..284c1df5df 100644
--- a/internal/kv/rocksdb/rocksdb_kv.go
+++ b/internal/kv/rocksdb/rocksdb_kv.go
@@ -158,7 +158,7 @@ func (kv *RocksdbKV) MultiLoad(keys []string) ([]string, error) {
 // Save a pair of key-value
 func (kv *RocksdbKV) Save(key, value string) error {
 	if kv.DB == nil {
-		return errors.New("Rocksdb instance is nil when do save")
+		return errors.New("rocksdb instance is nil when do save")
 	}
 	err := kv.DB.Put(kv.WriteOptions, []byte(key), []byte(value))
 	return err