diff --git a/htdocs/langs/en_US/agenda.lang b/htdocs/langs/en_US/agenda.lang
index 116fc189732..c7278554192 100644
--- a/htdocs/langs/en_US/agenda.lang
+++ b/htdocs/langs/en_US/agenda.lang
@@ -97,7 +97,7 @@ AgendaUrlOptions1=You can also add following parameters to filter output:
 AgendaUrlOptions3=<b>logina=%s</b> to restrict output to actions owned by a user <b>%s</b>.
 AgendaUrlOptionsNotAdmin=<b>logina=!%s</b> to restrict output to actions not owned by user <b>%s</b>.
 AgendaUrlOptions4=<b>logint=%s</b> to restrict output to actions assigned to user <b>%s</b> (owner and others).
-AgendaUrlOptionsProject=<b>project=PROJECT_ID</b> to restrict output to actions associated to project <b>PROJECT_ID</b>.
+AgendaUrlOptionsProject=<b>project=__PROJECT_ID__</b> to restrict output to actions linked to project <b>__PROJECT_ID__</b>.
 AgendaShowBirthdayEvents=Show birthdays of contacts
 AgendaHideBirthdayEvents=Hide birthdays of contacts
 Busy=Busy