diff --git a/homeassistant/components/geonetnz_volcano/config_flow.py b/homeassistant/components/geonetnz_volcano/config_flow.py
index 21c9265c1dc..6de169c8602 100644
--- a/homeassistant/components/geonetnz_volcano/config_flow.py
+++ b/homeassistant/components/geonetnz_volcano/config_flow.py
@@ -13,6 +13,7 @@ from homeassistant.const import (
 )
 from homeassistant.core import callback
 from homeassistant.helpers import config_validation as cv
+from homeassistant.util.unit_system import IMPERIAL_SYSTEM
 
 from .const import DEFAULT_RADIUS, DEFAULT_SCAN_INTERVAL, DOMAIN
 
@@ -57,7 +58,7 @@ class GeonetnzVolcanoFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
         if identifier in configured_instances(self.hass):
             return await self._show_form({"base": "already_configured"})
 
-        if self.hass.config.units.name == CONF_UNIT_SYSTEM_IMPERIAL:
+        if self.hass.config.units is IMPERIAL_SYSTEM:
             user_input[CONF_UNIT_SYSTEM] = CONF_UNIT_SYSTEM_IMPERIAL
         else:
             user_input[CONF_UNIT_SYSTEM] = CONF_UNIT_SYSTEM_METRIC