diff --git a/cereal/services.py b/cereal/services.py
index d94c3f11fb..40d9b38c05 100755
--- a/cereal/services.py
+++ b/cereal/services.py
@@ -75,7 +75,7 @@ _services: dict[str, tuple] = {
 
   # debug
   "uiDebug": (True, 0., 1),
-  "alertDebug": (True, 0.),
+  "alertDebug": (True, 0., 1.),
   "roadEncodeData": (False, 20.),
   "driverEncodeData": (False, 20.),
   "wideRoadEncodeData": (False, 20.),