diff --git a/HowtoMySQL/Replication.md b/HowtoMySQL/Replication.md
index 0ae9de86..3cce040f 100644
--- a/HowtoMySQL/Replication.md
+++ b/HowtoMySQL/Replication.md
@@ -245,12 +245,13 @@ Le mettre dans une unité systemd `/etc/systemd/system/pt-heartbeat.service` :
 ~~~
 [Unit]
 Description=Check slave lag.
-After=network.target
+After=network.target mysql.service
 
 [Service]
 User=percona
 ExecStart=/usr/bin/pt-heartbeat --defaults-file /home/percona/.my.cnf --create-table --database percona --table heartbeat --update
 Type=simple
+Restart=always
 
 [Install]
 WantedBy=default.target