diff --git a/br/br-pitr-manual.md b/br/br-pitr-manual.md
index 5073f35d00fab..377a69ea271fd 100644
--- a/br/br-pitr-manual.md
+++ b/br/br-pitr-manual.md
@@ -290,7 +290,7 @@ Usage example:
 
 ```shell
 ./br log truncate --until='2022-07-26 21:20:00+0800' \
---storage='s3://backup-101/logbackup?access-key=${access-key}&secret-access-key=${secret-access-key}"'
+--storage='s3://backup-101/logbackup?access-key=${access-key}&secret-access-key=${secret-access-key}'
 ```
 
 Expected output: