Index: sys/dev/usb/if_urtw.c
===================================================================
RCS file: /cvsroot/src/sys/dev/usb/if_urtw.c,v
retrieving revision 1.6
diff -p -u -r1.6 if_urtw.c
--- sys/dev/usb/if_urtw.c	16 Oct 2013 18:55:31 -0000	1.6
+++ sys/dev/usb/if_urtw.c	28 Mar 2016 15:30:48 -0000
@@ -729,8 +729,9 @@ urtw_attach(device_t parent, device_t se
 	IFQ_SET_READY(&ifp->if_snd);
 	memcpy(ifp->if_xname, device_xname(self), IFNAMSIZ);
 
-	if_attach(ifp);
+	if_initialize(ifp);
 	ieee80211_ifattach(ic);
+	if_register(ifp);
 
 	/* override state transition machine */
 	sc->sc_newstate = ic->ic_newstate;
Index: sys/dev/usb/if_urtwn.c
===================================================================
RCS file: /cvsroot/src/sys/dev/usb/if_urtwn.c,v
retrieving revision 1.41
diff -p -u -r1.41 if_urtwn.c
--- sys/dev/usb/if_urtwn.c	18 Jan 2016 02:45:05 -0000	1.41
+++ sys/dev/usb/if_urtwn.c	28 Mar 2016 15:30:49 -0000
@@ -439,8 +439,9 @@ urtwn_attach(device_t parent, device_t s
 	IFQ_SET_READY(&ifp->if_snd);
 	memcpy(ifp->if_xname, device_xname(sc->sc_dev), IFNAMSIZ);
 
-	if_attach(ifp);
+	if_initialize(ifp);
 	ieee80211_ifattach(ic);
+	if_register(ifp);
 
 	/* override default methods */
 	ic->ic_newassoc = urtwn_newassoc;