diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index 63c07243993c..7d6876dbcc96 100644
--- a/drivers/w1/w1.c
+++ b/drivers/w1/w1.c
@@ -459,7 +459,7 @@ static int __w1_attach_slave_device(struct w1_slave *sl)
 		 (unsigned long long) sl->reg_num.id);
 
 	dev_dbg(&sl->dev, "%s: registering %s as %p.\n", __func__,
-		&sl->dev.bus_id[0]);
+		&sl->dev.bus_id[0], sl);
 
 	err = device_register(&sl->dev);
 	if (err < 0) {