--- /n/sources/plan9/sys/src/9k/ip/ip.c	Sun Mar  3 05:25:00 2019
+++ /sys/src/9k/ip/ip.c	Mon Oct 26 00:00:00 2026
@@ -204,7 +204,7 @@
 		medialen = ifc->maxtu - ifc->medium->hsize;
 	if(len <= medialen) {
 		if(!gating)
-			hnputs(eh->id, incref(&ip->id4));
+			hnputs(eh->id, aadd(&ip->id4.ref, 1));
 		hnputs(eh->length, len);
 		if(!gating){
 			eh->frag[0] = 0;
@@ -244,7 +244,7 @@
 	if(gating)
 		lid = nhgets(eh->id);
 	else
-		lid = incref(&ip->id4);
+		lid = aadd(&ip->id4.ref, 1);
 
 	offset = IP4HDR;
 	while(xp != nil && offset && offset >= BLEN(xp)) {
--- /n/sources/plan9/sys/src/9k/ip/ipv6.c	Sun Mar  3 05:25:00 2019
+++ /sys/src/9k/ip/ipv6.c	Mon Oct 26 00:00:00 2026
@@ -154,7 +154,7 @@
 		goto raise;
 	}
 
-	lid = incref(&ip->id6);
+	lid = aadd(&ip->id6.ref, 1);
 	fraghdr.nexthdr = nexthdr;
 	fraghdr.res = 0;
 	hnputl(fraghdr.id, lid);
--- /n/sources/plan9/sys/src/9k/port/portfns.h	Sun Oct 25 00:00:00 2026
+++ /sys/src/9k/port/portfns.h	Mon Oct 26 00:00:00 2026
@@ -1,4 +1,5 @@
 void		_assert(char*);
+int		aadd(int*, int);
 void		accounttime(void);
 void		addbootfile(char*, uchar*, ulong);
 Timer*		addclock0link(void (*)(void), int);