diff --git a/usr.bin/kdump/kdump.c b/usr.bin/kdump/kdump.c
index e4af82a653a5..3480997a748a 100644
--- a/usr.bin/kdump/kdump.c
+++ b/usr.bin/kdump/kdump.c
@@ -58,6 +58,7 @@ extern int errno;
 #include <sys/ktrace.h>
 #include <sys/ioctl.h>
 #include <sys/ptrace.h>
+#include <sys/socket.h>
 #include <err.h>
 #include <locale.h>
 #include <stdio.h>
@@ -528,14 +529,23 @@ ktrsyscall(struct ktr_syscall *ktr)
 				ip++;
 				narg-=2;
 			} else if (ktr->ktr_code == SYS_socket) {
+				int sockdomain;
 				(void)putchar('(');
-				sockdomainname((int)*ip);
+				sockdomain=(int)*ip;
+				sockdomainname(sockdomain);
 				ip++;
 				narg--;
 				(void)putchar(',');
 				socktypename((int)*ip);
 				ip++;
 				narg--;
+				if (sockdomain == PF_INET ||
+				    sockdomain == PF_INET6) {
+					(void)putchar(',');
+					sockipprotoname((int)*ip);
+					ip++;
+					narg--;
+				}
 				c = ',';
 			} else if (ktr->ktr_code == SYS_setsockopt ||
 				   ktr->ktr_code == SYS_getsockopt) {
diff --git a/usr.bin/kdump/kdump_subr.h b/usr.bin/kdump/kdump_subr.h
index f69921d8c0de..6e336ddbc22a 100644
--- a/usr.bin/kdump/kdump_subr.h
+++ b/usr.bin/kdump/kdump_subr.h
@@ -21,6 +21,7 @@ void flockname (int);
 void sockoptname (int);
 void sockoptlevelname (int, int);
 void sockdomainname (int);
+void sockipprotoname (int);
 void socktypename (int);
 void thrcreateflagsname (int);
 void mlockallname (int);
diff --git a/usr.bin/kdump/mksubr b/usr.bin/kdump/mksubr
index 78cbeabc3d68..4231aab48be2 100644
--- a/usr.bin/kdump/mksubr
+++ b/usr.bin/kdump/mksubr
@@ -138,6 +138,7 @@ cat <<_EOF_
 #define _KERNEL
 #include <sys/socket.h>
 #undef _KERNEL
+#include <netinet/in.h>
 #include <sys/param.h>
 #include <sys/mount.h>
 #include <sys/resource.h>
@@ -335,6 +336,7 @@ auto_switch_type "lio_listioname" "LIO_(NO)?WAIT[[:space:]]+[0-9]+" "aio.h"
 auto_switch_type "minheritname" "INHERIT_[A-Z]+[[:space:]]+[0-9]+" "sys/mman.h"
 auto_switch_type "quotactlname" "Q_[A-Z]+[[:space:]]+0x[0-9]+" "ufs/ufs/quota.h"
 auto_if_type "sockdomainname" "PF_[[:alnum:]]+[[:space:]]+" "sys/socket.h"
+auto_if_type "sockipprotoname" "IPPROTO_[[:alnum:]]+[[:space:]]+" "netinet/in.h"
 auto_switch_type "sockoptname" "SO_[A-Z]+[[:space:]]+0x[0-9]+" "sys/socket.h"
 auto_switch_type "socktypename" "SOCK_[A-Z]+[[:space:]]+[1-9]+[0-9]*" "sys/socket.h"