diff --git a/HowtoDovecot.md b/HowtoDovecot.md
index 4b914d45..cb74f81e 100644
--- a/HowtoDovecot.md
+++ b/HowtoDovecot.md
@@ -584,7 +584,7 @@ On utilise les checks classiques pour POP(S)/IMAP(S) :
 
 ~~~
 /usr/lib/nagios/plugins/check_imap -H localhost
-/usr/lib/nagios/plugins/check_imap -H localhost -E -s "a login $login $password\n" -e "Logged in"
+/usr/lib/nagios/plugins/check_imap -H localhost -E -s "a login $login $password\n" -e "Logged in" -M
 /usr/lib/nagios/plugins/check_imap -S -H localhost -p 993
 /usr/lib/nagios/plugins/check_pop -H localhost
 /usr/lib/nagios/plugins/check_pop -S -H localhost -p 995