diff --git a/hassio/core.py b/hassio/core.py
index d32431ae9..4f762ebee 100644
--- a/hassio/core.py
+++ b/hassio/core.py
@@ -23,7 +23,7 @@ class HassIO(CoreSysAttributes):
         """Setup HassIO orchestration."""
         # update timezone
         if self.sys_config.timezone == 'UTC':
-            self.sys_config.timezone = await fetch_timezone(self._websession)
+            self.sys_config.timezone = await fetch_timezone(self.sys_websession)
 
         # Load DBus
         await self.sys_dbus.load()