diff --git a/selfdrive/car/hyundai/fingerprints.py b/selfdrive/car/hyundai/fingerprints.py
index d115283dd5..c3d3dcd037 100644
--- a/selfdrive/car/hyundai/fingerprints.py
+++ b/selfdrive/car/hyundai/fingerprints.py
@@ -2,6 +2,9 @@
 from cereal import car
 from openpilot.selfdrive.car.hyundai.values import CAR
 
+# The existence of SCC or RDR in the fwdRadar FW usually determines the radar's function,
+# i.e. if it sends the SCC messages or if another ECU like the camera or ADAS Driving ECU does
+
 Ecu = car.CarParams.Ecu
 
 FINGERPRINTS = {