diff --git a/buildroot-external/rootfs-overlay/usr/lib/systemd/system.conf.d/watchdog.conf b/buildroot-external/rootfs-overlay/usr/lib/systemd/system.conf.d/watchdog.conf
new file mode 100644
index 000000000..8f664741a
--- /dev/null
+++ b/buildroot-external/rootfs-overlay/usr/lib/systemd/system.conf.d/watchdog.conf
@@ -0,0 +1,3 @@
+[Manager]
+RuntimeWatchdogSec=default
+WatchdogDevice=/dev/watchdog