diff --git a/sys/netinet/in_pcb.h b/sys/netinet/in_pcb.h
--- a/sys/netinet/in_pcb.h
+++ b/sys/netinet/in_pcb.h
@@ -464,13 +464,14 @@
 	uma_zone_t	ips_zone;
 	uma_zone_t	ips_portzone;
 	uma_init	ips_pcbinit;
+	size_t		ips_size;
 	const char *	ips_zone_name;
 	const char *	ips_portzone_name;
 	const char *	ips_infolock_name;
 	const char *	ips_hashlock_name;
 };
 
-#define INPCBSTORAGE_DEFINE(prot, lname, zname, iname, hname)		\
+#define INPCBSTORAGE_DEFINE(prot, ppcb, lname, zname, iname, hname)	\
 static int								\
 prot##_inpcb_init(void *mem, int size __unused, int flags __unused)	\
 {									\
@@ -480,6 +481,7 @@
 	return (0);							\
 }									\
 static struct inpcbstorage prot = {					\
+	.ips_size = sizeof(struct ppcb),				\
 	.ips_pcbinit = prot##_inpcb_init,				\
 	.ips_zone_name = zname,						\
 	.ips_portzone_name = zname " ports",				\
diff --git a/sys/netinet/in_pcb.c b/sys/netinet/in_pcb.c
--- a/sys/netinet/in_pcb.c
+++ b/sys/netinet/in_pcb.c
@@ -551,7 +551,7 @@
 	struct inpcbstorage *pcbstor = arg;
 
 	pcbstor->ips_zone = uma_zcreate(pcbstor->ips_zone_name,
-	    sizeof(struct inpcb), NULL, inpcb_dtor, pcbstor->ips_pcbinit,
+	    pcbstor->ips_size, NULL, inpcb_dtor, pcbstor->ips_pcbinit,
 	    inpcb_fini, UMA_ALIGN_PTR, UMA_ZONE_SMR);
 	pcbstor->ips_portzone = uma_zcreate(pcbstor->ips_portzone_name,
 	    sizeof(struct inpcbport), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
diff --git a/sys/netinet/raw_ip.c b/sys/netinet/raw_ip.c
--- a/sys/netinet/raw_ip.c
+++ b/sys/netinet/raw_ip.c
@@ -182,7 +182,7 @@
 }
 #endif /* INET */
 
-INPCBSTORAGE_DEFINE(ripcbstor, "rawinp", "ripcb", "rip", "riphash");
+INPCBSTORAGE_DEFINE(ripcbstor, inpcb, "rawinp", "ripcb", "rip", "riphash");
 
 static void
 rip_init(void *arg __unused)
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c
--- a/sys/netinet/tcp_subr.c
+++ b/sys/netinet/tcp_subr.c
@@ -1148,7 +1148,7 @@
 #define	ISN_LOCK()	mtx_lock(&isn_mtx)
 #define	ISN_UNLOCK()	mtx_unlock(&isn_mtx)
 
-INPCBSTORAGE_DEFINE(tcpcbstor, "tcpinp", "tcp_inpcb", "tcp", "tcphash");
+INPCBSTORAGE_DEFINE(tcpcbstor, inpcb, "tcpinp", "tcp_inpcb", "tcp", "tcphash");
 
 /*
  * Take a value and get the next power of 2 that doesn't overflow.
diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c
--- a/sys/netinet/udp_usrreq.c
+++ b/sys/netinet/udp_usrreq.c
@@ -170,9 +170,9 @@
 		    struct mbuf *, struct thread *, int);
 #endif
 
-INPCBSTORAGE_DEFINE(udpcbstor, "udpinp", "udp_inpcb", "udp", "udphash");
-INPCBSTORAGE_DEFINE(udplitecbstor, "udpliteinp", "udplite_inpcb", "udplite",
-    "udplitehash");
+INPCBSTORAGE_DEFINE(udpcbstor, inpcb, "udpinp", "udp_inpcb", "udp", "udphash");
+INPCBSTORAGE_DEFINE(udplitecbstor, inpcb, "udpliteinp", "udplite_inpcb",
+    "udplite", "udplitehash");
 
 static void
 udp_vnet_init(void *arg __unused)