diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c
index 91dc30b9109..cf3cd47fe9c 100644
--- a/sys/kern/subr_bus.c
+++ b/sys/kern/subr_bus.c
@@ -288,10 +288,10 @@ device_sysctl_init(device_t dev)
 		return;
 	devclass_sysctl_init(dc);
 	sysctl_ctx_init(&dev->sysctl_ctx);
-	dev->sysctl_tree = SYSCTL_ADD_NODE(&dev->sysctl_ctx,
+	dev->sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&dev->sysctl_ctx,
 	    SYSCTL_CHILDREN(dc->sysctl_tree), OID_AUTO,
 	    dev->nameunit + strlen(dc->name),
-	    CTLFLAG_RD, NULL, "");
+	    CTLFLAG_RD, NULL, "", "device_index");
 	SYSCTL_ADD_PROC(&dev->sysctl_ctx, SYSCTL_CHILDREN(dev->sysctl_tree),
 	    OID_AUTO, "%desc", CTLTYPE_STRING | CTLFLAG_RD,
 	    dev, DEVICE_SYSCTL_DESC, device_sysctl_handler, "A",