diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 487025d31d44..015b126ce455 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1074,8 +1074,6 @@ static int register_root_hub(struct usb_hcd *hcd)
 
 	usb_dev->devnum = devnum;
 	usb_dev->bus->devnum_next = devnum + 1;
-	memset (&usb_dev->bus->devmap.devicemap, 0,
-			sizeof usb_dev->bus->devmap.devicemap);
 	set_bit (devnum, usb_dev->bus->devmap.devicemap);
 	usb_set_device_state(usb_dev, USB_STATE_ADDRESS);