Index: head/sys/kern/uipc_sockbuf.c
===================================================================
--- head/sys/kern/uipc_sockbuf.c
+++ head/sys/kern/uipc_sockbuf.c
@@ -1101,11 +1101,11 @@
 
 void
 sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0,
-    struct mbuf *control)
+    struct mbuf *control, int flags)
 {
 	struct mbuf *m, *mlast;
 
-	m_clrprotoflags(m0);
+	sbm_clrprotoflags(m0, flags);
 	m_last(control)->m_next = m0;
 
 	SBLASTRECORDCHK(sb);
@@ -1123,11 +1123,12 @@
 }
 
 void
-sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, struct mbuf *control)
+sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, struct mbuf *control,
+    int flags)
 {
 
 	SOCKBUF_LOCK(sb);
-	sbappendcontrol_locked(sb, m0, control);
+	sbappendcontrol_locked(sb, m0, control, flags);
 	SOCKBUF_UNLOCK(sb);
 }
 
Index: head/sys/kern/uipc_usrreq.c
===================================================================
--- head/sys/kern/uipc_usrreq.c
+++ head/sys/kern/uipc_usrreq.c
@@ -1192,7 +1192,7 @@
 		case SOCK_STREAM:
 			if (control != NULL) {
 				sbappendcontrol_locked(&so2->so_rcv, m,
-				    control);
+				    control, flags);
 				control = NULL;
 			} else
 				sbappend_locked(&so2->so_rcv, m, flags);
Index: head/sys/sys/sockbuf.h
===================================================================
--- head/sys/sys/sockbuf.h
+++ head/sys/sys/sockbuf.h
@@ -145,9 +145,9 @@
 int	sbappendaddr_nospacecheck_locked(struct sockbuf *sb,
 	    const struct sockaddr *asa, struct mbuf *m0, struct mbuf *control);
 void	sbappendcontrol(struct sockbuf *sb, struct mbuf *m0,
-	    struct mbuf *control);
+	    struct mbuf *control, int flags);
 void	sbappendcontrol_locked(struct sockbuf *sb, struct mbuf *m0,
-	    struct mbuf *control);
+	    struct mbuf *control, int flags);
 void	sbappendrecord(struct sockbuf *sb, struct mbuf *m0);
 void	sbappendrecord_locked(struct sockbuf *sb, struct mbuf *m0);
 void	sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n);