diff --git a/sys/dev/superio/superio.c b/sys/dev/superio/superio.c
--- a/sys/dev/superio/superio.c
+++ b/sys/dev/superio/superio.c
@@ -768,6 +768,18 @@
 	return (child);
 }
 
+static void
+superio_child_deleted(device_t dev, device_t child)
+{
+	struct superio_devinfo *dinfo;
+
+	dinfo = device_get_ivars(child);
+	if (dinfo == NULL)
+		return;
+	resource_list_free(&dinfo->resources);
+	free(dinfo, M_DEVBUF);
+}
+
 static int
 superio_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
 {
@@ -1078,6 +1090,7 @@
 	DEVMETHOD(device_resume,	bus_generic_resume),
 
 	DEVMETHOD(bus_add_child,	superio_add_child),
+	DEVMETHOD(bus_child_deleted,	superio_child_deleted),
 	DEVMETHOD(bus_child_detached,	superio_child_detached),
 	DEVMETHOD(bus_child_location,	superio_child_location),
 	DEVMETHOD(bus_child_pnpinfo,	superio_child_pnp),