diff --git a/homeassistant/components/withings/common.py b/homeassistant/components/withings/common.py
index b3b8a8801d9..b7c3cec6d9b 100644
--- a/homeassistant/components/withings/common.py
+++ b/homeassistant/components/withings/common.py
@@ -258,7 +258,7 @@ WITHINGS_ATTRIBUTES = [
         Measurement.HYDRATION,
         MeasureType.HYDRATION,
         "Hydration",
-        UNIT_PERCENTAGE,
+        MASS_KILOGRAMS,
         "mdi:water",
         SENSOR_DOMAIN,
         False,