diff --git a/lib/libc/sys/ktrace.2 b/lib/libc/sys/ktrace.2
--- a/lib/libc/sys/ktrace.2
+++ b/lib/libc/sys/ktrace.2
@@ -109,7 +109,7 @@
 	pid_t		ktr_pid;		/* process id */
 	char		ktr_comm[MAXCOMLEN+1];	/* command name */
 	struct timeval	ktr_time;		/* timestamp */
-	intptr_t	ktr_tid;		/* was ktr_buffer */
+	long		ktr_tid;		/* thread id */
 };
 .Ed
 .Pp
diff --git a/sys/sys/ktrace.h b/sys/sys/ktrace.h
--- a/sys/sys/ktrace.h
+++ b/sys/sys/ktrace.h
@@ -58,7 +58,7 @@
 	pid_t	ktr_pid;		/* process id */
 	char	ktr_comm[MAXCOMLEN + 1];/* command name */
 	struct	timeval ktr_time;	/* timestamp */
-	intptr_t	ktr_tid;	/* was ktr_buffer */
+	long	ktr_tid;		/* thread id */
 };
 
 struct ktr_header {
@@ -68,7 +68,8 @@
 	pid_t	ktr_pid;		/* process id */
 	char	ktr_comm[MAXCOMLEN + 1];/* command name */
 	struct	timespec ktr_time;	/* timestamp */
-	intptr_t	ktr_tid;	/* thread id */
+	/* XXX: make ktr_tid an lwpid_t on next ABI break */
+	long	ktr_tid;		/* thread id */
 	int	ktr_cpu;		/* cpu id */
 };
 
diff --git a/usr.bin/kdump/kdump.c b/usr.bin/kdump/kdump.c
--- a/usr.bin/kdump/kdump.c
+++ b/usr.bin/kdump/kdump.c
@@ -449,15 +449,15 @@
 			ktr_header.ktr_type &= ~KTR_DROP;
 			if (!drop_logged && threads) {
 				printf(
-				    "%6jd %6jd %-8.*s Events dropped.\n",
-				    (intmax_t)ktr_header.ktr_pid,
+				    "%6d %6d %-8.*s Events dropped.\n",
+				    ktr_header.ktr_pid,
 				    ktr_header.ktr_tid > 0 ?
-				    (intmax_t)ktr_header.ktr_tid : 0,
+				    (lwpid_t)ktr_header.ktr_tid : 0,
 				    MAXCOMLEN, ktr_header.ktr_comm);
 				drop_logged = 1;
 			} else if (!drop_logged) {
-				printf("%6jd %-8.*s Events dropped.\n",
-				    (intmax_t)ktr_header.ktr_pid, MAXCOMLEN,
+				printf("%6d %-8.*s Events dropped.\n",
+				    ktr_header.ktr_pid, MAXCOMLEN,
 				    ktr_header.ktr_comm);
 				drop_logged = 1;
 			}
@@ -724,12 +724,11 @@
 	 * negative tid's as 0.
 	 */
 	if (threads)
-		printf("%6jd %6jd %-8.*s ", (intmax_t)kth->ktr_pid,
-		    kth->ktr_tid > 0 ? (intmax_t)kth->ktr_tid : 0,
+		printf("%6d %6d %-8.*s ", kth->ktr_pid,
+		    kth->ktr_tid > 0 ? (lwpid_t)kth->ktr_tid : 0,
 		    MAXCOMLEN, kth->ktr_comm);
 	else
-		printf("%6jd %-8.*s ", (intmax_t)kth->ktr_pid, MAXCOMLEN,
-		    kth->ktr_comm);
+		printf("%6d %-8.*s ", kth->ktr_pid, MAXCOMLEN, kth->ktr_comm);
         if (timestamp) {
 		if (version == KTR_VERSION0)
 			dumptimeval((struct ktr_header_v0 *)kth);