diff --git a/client/dictionaries/mfc_default_keys.dic b/client/dictionaries/mfc_default_keys.dic
index ed2b1201d..1b0d1aa4e 100644
--- a/client/dictionaries/mfc_default_keys.dic
+++ b/client/dictionaries/mfc_default_keys.dic
@@ -1742,5 +1742,6 @@ FFD46FF6C5EE
 11AC8C8F3AF2
 #
 # Spackular
+# data from http://www.proxmark.org/forum/viewtopic.php?pid=45100#p45100
 7CB033257498 # key A
 1153AABAFF6C # key b