diff --git a/homeassistant/components/mysensors/sensor.py b/homeassistant/components/mysensors/sensor.py
index a62318aea53..1a5f7330ddf 100644
--- a/homeassistant/components/mysensors/sensor.py
+++ b/homeassistant/components/mysensors/sensor.py
@@ -1,6 +1,8 @@
 """Support for MySensors sensors."""
 from typing import Callable
 
+from awesomeversion import AwesomeVersion
+
 from homeassistant.components import mysensors
 from homeassistant.components.mysensors import on_unload
 from homeassistant.components.mysensors.const import MYSENSORS_DISCOVERY
@@ -115,7 +117,7 @@ class MySensorsSensor(mysensors.device.MySensorsEntity, SensorEntity):
         """Return the unit of measurement of this entity."""
         set_req = self.gateway.const.SetReq
         if (
-            float(self.gateway.protocol_version) >= 1.5
+            AwesomeVersion(self.gateway.protocol_version) >= AwesomeVersion("1.5")
             and set_req.V_UNIT_PREFIX in self._values
         ):
             return self._values[set_req.V_UNIT_PREFIX]