diff --git a/custom_field_list.json b/custom_field_list.json
index df761b7..97b9b31 100644
--- a/custom_field_list.json
+++ b/custom_field_list.json
@@ -66,5 +66,13 @@
         ["ext_pressure", "divide_by_10"],
         ["pulse_counts","none"]
     ]
+},
+"HORUSRADMON": {
+    "comment": "Horus Radiation Monitor Payload",
+    "struct": "<hxxxxxH",
+    "fields": [
+        ["ascent_rate", "divide_by_100"],
+        ["pulse_count","none"]
+    ]
 }
 }
diff --git a/payload_id_list.txt b/payload_id_list.txt
index 925a1ff..6b9d325 100644
--- a/payload_id_list.txt
+++ b/payload_id_list.txt
@@ -191,3 +191,4 @@
 312, PH1M-V2
 31415, HORUS-V2
 31416, ITSWINDY
+31417, HORUSRADMON