diff --git a/homeassistant-supervised/etc/systemd/logind.conf.d/hassio.conf b/homeassistant-supervised/etc/systemd/logind.conf.d/hassio.conf
new file mode 100644
index 0000000..08d27e6
--- /dev/null
+++ b/homeassistant-supervised/etc/systemd/logind.conf.d/hassio.conf
@@ -0,0 +1,5 @@
+[Login]
+# Allow Supervisor enough time to gracefully stop all add-ons, Home Assistant
+# Core, and plugins before the system shuts down. Core alone can take 40+
+# seconds to stop; 300s gives enough headroom for a clean shutdown.
+InhibitDelayMaxSec=300