diff --git a/config/locales/es.yml b/config/locales/es.yml
index 2940a041e..d1d1e1492 100644
--- a/config/locales/es.yml
+++ b/config/locales/es.yml
@@ -524,6 +524,7 @@ es:
     space_explications_alert: "Explanation message on the space reservation page"
     visibility_yearly: "Maximum visibility for annual subscribers"
     visibility_others: "Maximum visibility for other members"
+    reservation_deadline: "Prevent reservation before it starts"
     display_name_enable: "Display names in the calendar"
     machines_sort_by: "Machines display order"
     accounting_journal_code: "Journal code"