diff --git a/client/dictionaries/mfc_default_keys.dic b/client/dictionaries/mfc_default_keys.dic
index 63598f78b..0d34541ff 100644
--- a/client/dictionaries/mfc_default_keys.dic
+++ b/client/dictionaries/mfc_default_keys.dic
@@ -145,6 +145,9 @@ F1D83F964314
 222222222222
 27DD91F1FCF1
 #
+# Hotel system
+505209016A1F
+#
 # Directory and eventlog KeyB
 2BA9621E0A36
 #