diff --git a/docs/Gerrit/gerrit.md b/docs/Gerrit/gerrit.md
index 85c9afad423..f1d77386fd6 100644
--- a/docs/Gerrit/gerrit.md
+++ b/docs/Gerrit/gerrit.md
@@ -75,9 +75,11 @@ git checkout -b issue-nnnn
 please read [this document](changes.md).
 
 ```
-git commit -s
+git commit -s -a
 ```
 
+Then input precise and readable commit msg and submit.
+
 6. Any code changes that affect documentation should be accompanied by
 corresponding changes (or additions) to the documentation and tests. This
 will ensure that if the merged PR is reversed, all traces of the change will