diff --git a/homeassistant/components/homekit_controller/sensor.py b/homeassistant/components/homekit_controller/sensor.py
index f6f450b2b01..9ffa6c6b597 100644
--- a/homeassistant/components/homekit_controller/sensor.py
+++ b/homeassistant/components/homekit_controller/sensor.py
@@ -3,9 +3,9 @@ from homeassistant.const import TEMP_CELSIUS
 
 from . import KNOWN_DEVICES, HomeKitEntity
 
-HUMIDITY_ICON = 'mdi-water-percent'
-TEMP_C_ICON = "mdi-temperature-celsius"
-BRIGHTNESS_ICON = "mdi-brightness-6"
+HUMIDITY_ICON = 'mdi:water-percent'
+TEMP_C_ICON = "mdi:thermometer"
+BRIGHTNESS_ICON = "mdi:brightness-6"
 
 UNIT_PERCENT = "%"
 UNIT_LUX = "lux"