diff --git a/supervisor/updater.py b/supervisor/updater.py
index dad4494b8..d4c114032 100644
--- a/supervisor/updater.py
+++ b/supervisor/updater.py
@@ -242,11 +242,15 @@ class Updater(FileConfiguration, CoreSysAttributes):
 
             # Update HassOS version
             if self.sys_os.board:
-                events.append("os")
-                self._data[ATTR_HASSOS] = AwesomeVersion(
-                    data["hassos"][self.sys_os.board]
-                )
                 self._data[ATTR_OTA] = data["ota"]
+                if version := data["hassos"].get(self.sys_os.board):
+                    events.append("os")
+                    self._data[ATTR_HASSOS] = AwesomeVersion(version)
+                else:
+                    _LOGGER.warning(
+                        "Board '%s' not found in version file. No OS updates.",
+                        self.sys_os.board,
+                    )
 
             # Update Home Assistant plugins
             self._data[ATTR_CLI] = AwesomeVersion(data["cli"])