diff --git a/selfdrive/ui/tests/test_ui/raylib_screenshots.py b/selfdrive/ui/tests/test_ui/raylib_screenshots.py
index 7fb22e4484..1ac5083fc6 100755
--- a/selfdrive/ui/tests/test_ui/raylib_screenshots.py
+++ b/selfdrive/ui/tests/test_ui/raylib_screenshots.py
@@ -69,7 +69,7 @@ def setup_pair_device(click, pm: PubMaster):
 
 
 def setup_offroad_alert(click, pm: PubMaster):
-  set_offroad_alert("Offroad_TemperatureTooHigh", True, extra_text='99')
+  set_offroad_alert("Offroad_TemperatureTooHigh", True, extra_text='99C')
   for alert in OFFROAD_ALERTS:
     set_offroad_alert(alert, True)
 
diff --git a/selfdrive/ui/widgets/offroad_alerts.py b/selfdrive/ui/widgets/offroad_alerts.py
index 6ca0ca2c40..7ad96bc9a5 100644
--- a/selfdrive/ui/widgets/offroad_alerts.py
+++ b/selfdrive/ui/widgets/offroad_alerts.py
@@ -190,7 +190,7 @@ class OffroadAlert(AbstractAlert):
       alert_json = self.params.get(alert_data.key)
 
       if alert_json:
-        text = alert_json.get("text", "").replace("{}", alert_json.get("extra", ""))
+        text = alert_json.get("text", "").replace("%1", alert_json.get("extra", ""))
 
       alert_data.text = text
       alert_data.visible = bool(text)