diff --git a/lib/extension/homeassistant.js b/lib/extension/homeassistant.js
index cebad1a41..ed99e79e9 100644
--- a/lib/extension/homeassistant.js
+++ b/lib/extension/homeassistant.js
@@ -518,6 +518,7 @@ const cfg = {
         type: 'sensor',
         object_id: 'radioactive_events_per_minute',
         discovery_payload: {
+            unit_of_measurement: 'rpm',
             value_template: '{{ value_json.radioactive_events_per_minute }}',
         },
     },
@@ -525,6 +526,7 @@ const cfg = {
         type: 'sensor',
         object_id: 'radiation_dose_per_hour',
         discovery_payload: {
+            unit_of_measurement: 'rph',
             value_template: '{{ value_json.radiation_dose_per_hour }}',
         },
     },