diff --git a/payload_id_list.txt b/payload_id_list.txt
index 9153fdd..27d675a 100644
--- a/payload_id_list.txt
+++ b/payload_id_list.txt
@@ -475,6 +475,8 @@
 595, FER-Klovic1
 596, FER-Klovic2
 597, DL8MIK
+598, KD9PRC-4FSK-1
+599, KD9PRC-4FSK-2
 31415, HORUS-V2
 31416, ITSWINDY
 31417, HORUSRADMON