diff --git a/docs/core/entity/water-heater.md b/docs/core/entity/water-heater.md
index 179908ae..77a8af5d 100644
--- a/docs/core/entity/water-heater.md
+++ b/docs/core/entity/water-heater.md
@@ -52,6 +52,7 @@ and are combined using the bitwise or (`|`) operator.
 | `TARGET_TEMPERATURE` | Temperature can be set    |
 | `OPERATION_MODE`     | Operation mode can be set |
 | `AWAY_MODE`          | Away mode can be set      |
+| `ON_OFF`             | Can be turned on or off   |
 
 ## Methods