diff --git a/HowtoHaproxy.md b/HowtoHaproxy.md
index edcbcee8..02463304 100644
--- a/HowtoHaproxy.md
+++ b/HowtoHaproxy.md
@@ -322,7 +322,7 @@ return="503 Service Unavailable"
 # Mysql is up but replication is not ok, return a 404
 # You may want to comment this line in master/master mode
 # It disable server (NOLB status) when replication is down or lagging
-/usr/lib/nagios/plugins/check_mysql -f /etc/mysql/debian.cnf --check-slave -c 60 >/dev/null || return="404 OK"
+/usr/lib/nagios/plugins/check_mysql -f /etc/mysql/debian.cnf --check-slave -c 60 >/dev/null || return="404 Not Found"
 
 cat <<EOF
 HTTP/1.0 ${return}