From 86c7f0bbacc59d00219b7f046150bd1bbf8da760 Mon Sep 17 00:00:00 2001
From: epenet <6771947+epenet@users.noreply.github.com>
Date: Wed, 31 Aug 2022 22:19:44 +0200
Subject: [PATCH] Improve type hints in hive (#77586)

---
 homeassistant/components/hive/climate.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/homeassistant/components/hive/climate.py b/homeassistant/components/hive/climate.py
index b6f4f8270b4..8e33dda244a 100644
--- a/homeassistant/components/hive/climate.py
+++ b/homeassistant/components/hive/climate.py
@@ -128,12 +128,12 @@ class HiveClimateEntity(HiveEntity, ClimateEntity):
             await self.hive.heating.setTargetTemperature(self.device, new_temperature)
 
     @refresh_system
-    async def async_set_preset_mode(self, preset_mode):
+    async def async_set_preset_mode(self, preset_mode: str) -> None:
         """Set new preset mode."""
         if preset_mode == PRESET_NONE and self.preset_mode == PRESET_BOOST:
             await self.hive.heating.setBoostOff(self.device)
         elif preset_mode == PRESET_BOOST:
-            curtemp = round(self.current_temperature * 2) / 2
+            curtemp = round((self.current_temperature or 0) * 2) / 2
             temperature = curtemp + 0.5
             await self.hive.heating.setBoostOn(self.device, 30, temperature)
 
-- 
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