diff --git a/selfdrive/controls/lib/events.py b/selfdrive/controls/lib/events.py
index 512d0044bd..4693f0c9cc 100644
--- a/selfdrive/controls/lib/events.py
+++ b/selfdrive/controls/lib/events.py
@@ -170,7 +170,7 @@ def calibration_incomplete_alert(CP, sm, metric):
   speed = int(Filter.MIN_SPEED * (CV.MS_TO_KPH if metric else CV.MS_TO_MPH))
   unit = "kph" if metric else "mph"
   return Alert(
-    "Calibration in Progress: %d" % sm['liveCalibration'].calPerc,
+    "Calibration in Progress: %d%%" % sm['liveCalibration'].calPerc,
     "Drive Above %d %s" % (speed, unit),
     AlertStatus.normal, AlertSize.mid,
     Priority.LOWEST, VisualAlert.none, AudibleAlert.none, 0., 0., .2)