diff --git a/custom_components/fpl/sensor.py b/custom_components/fpl/sensor.py
index 39d8cc8..67fd85d 100644
--- a/custom_components/fpl/sensor.py
+++ b/custom_components/fpl/sensor.py
@@ -67,7 +67,7 @@ class FplSensor(Entity):
 
     @property
     def unit_of_measurement(self):
-        return ""
+        return " "
 
     @property
     def icon(self):