diff --git a/tikv-configuration-file.md b/tikv-configuration-file.md
index 237635555992d..30bd8969c21ee 100644
--- a/tikv-configuration-file.md
+++ b/tikv-configuration-file.md
@@ -247,7 +247,7 @@ This document only describes the parameters that are not included in command-lin
 ### `raft-client-queue-size`
 
 + Specifies the queue size of the Raft messages in TiKV. If too many messages not sent in time result in a full buffer, or messages discarded, you can specify a greater value to improve system stability.
-+ Default value: `16384`
++ Default value: `16384`. Before v7.5.5, the default value is `8192`.
 
 ### `simplify-metrics` <span class="version-mark">New in v6.2.0</span>