diff --git a/homeassistant/components/water_heater/strings.json b/homeassistant/components/water_heater/strings.json
index 6991d371bd3..1b3af02610c 100644
--- a/homeassistant/components/water_heater/strings.json
+++ b/homeassistant/components/water_heater/strings.json
@@ -21,8 +21,8 @@
         "away_mode": {
           "name": "Away mode",
           "state": {
-            "off": "Off",
-            "on": "On"
+            "off": "[%key:common::state::off%]",
+            "on": "[%key:common::state::on%]"
           }
         }
       }