diff --git a/lib/extension/homeassistant.js b/lib/extension/homeassistant.js
index d832e8f6..440d8ebc 100644
--- a/lib/extension/homeassistant.js
+++ b/lib/extension/homeassistant.js
@@ -1670,7 +1670,7 @@ class HomeAssistant extends Extension {
             },
             {
                 property: 'water_leak',
-                condition: data.entity.device && data.entity.definition &&
+                condition: data.entity.device && data.entity.definition && mapping[data.entity.definition.model] &&
                     mapping[data.entity.definition.model].includes(cfg.binary_sensor_water_leak),
                 value: false,
             },