diff --git a/payload_id_list.txt b/payload_id_list.txt
index 8580b03..3591d90 100644
--- a/payload_id_list.txt
+++ b/payload_id_list.txt
@@ -398,6 +398,7 @@
 518, YT1C
 519, 9A4GE
 520, PE9M
+521, PD3T
 31415, HORUS-V2
 31416, ITSWINDY
 31417, HORUSRADMON