diff --git a/site/plugins/admin/lang/da_DK.json b/site/plugins/admin/lang/da_DK.json
index 7ea6f775..2030ee36 100644
--- a/site/plugins/admin/lang/da_DK.json
+++ b/site/plugins/admin/lang/da_DK.json
@@ -18,6 +18,7 @@
   "admin_themes": "Temaer",
   "admin_help": "Hjælp",
   "admin_getting_help": "Få hjælp",
+  "admin_message_json_invalid": "Invalid JSON",
   "admin_logout": "Log ud",
   "admin_profile": "Profil",
   "admin_view_site": "Vis websted",