diff --git a/selfdrive/car/hyundai/values.py b/selfdrive/car/hyundai/values.py
index 1dd0467f48..06bc889586 100644
--- a/selfdrive/car/hyundai/values.py
+++ b/selfdrive/car/hyundai/values.py
@@ -52,6 +52,7 @@ class Buttons:
   NONE = 0
   RES_ACCEL = 1
   SET_DECEL = 2
+  GAP_DIST = 3
   CANCEL = 4
 
 FINGERPRINTS = {