diff --git a/homeassistant/components/isy994/climate.py b/homeassistant/components/isy994/climate.py
index d68395f14da..9f4c52258a7 100644
--- a/homeassistant/components/isy994/climate.py
+++ b/homeassistant/components/isy994/climate.py
@@ -117,7 +117,7 @@ class ISYThermostatEntity(ISYNodeEntity, ClimateEntity):
         """Return the current humidity."""
         if not (humidity := self._node.aux_properties.get(PROP_HUMIDITY)):
             return None
-        if humidity == ISY_VALUE_UNKNOWN:
+        if humidity.value == ISY_VALUE_UNKNOWN:
             return None
         return int(humidity.value)