diff --git a/homeassistant/components/iron_os/strings.json b/homeassistant/components/iron_os/strings.json
index e9912add826..1549efba503 100644
--- a/homeassistant/components/iron_os/strings.json
+++ b/homeassistant/components/iron_os/strings.json
@@ -136,8 +136,8 @@
       "temp_unit": {
         "name": "Temperature display unit",
         "state": {
-          "celsius": "Celsius (C°)",
-          "fahrenheit": "Fahrenheit (F°)"
+          "celsius": "Celsius (°C)",
+          "fahrenheit": "Fahrenheit (°F)"
         }
       },
       "desc_scroll_speed": {