diff --git a/client/dictionaries/mfc_default_keys.dic b/client/dictionaries/mfc_default_keys.dic
index 088ab80d0..241581b69 100644
--- a/client/dictionaries/mfc_default_keys.dic
+++ b/client/dictionaries/mfc_default_keys.dic
@@ -2090,6 +2090,9 @@ D144BD193063
 8627C10A7014
 453857395635
 #
+# Unknown hotel system Sec 0 / A
+353038383134
+#
 # Data from "the more the marriott" mifare project (colonelborkmundus)
 # aka The Horde
 #