Index: sys/compat/linux/linux_misc.c
===================================================================
--- sys/compat/linux/linux_misc.c
+++ sys/compat/linux/linux_misc.c
@@ -915,7 +915,8 @@
 
 #ifdef DEBUG
 	if (ldebug(mknod))
-		printf(ARGS(mknod, "%s, %d, %zd"), path, args->mode, args->dev);
+		printf(ARGS(mknod, "%s, %d, %ju"), path, args->mode,
+		    (uintmax_t)args->dev);
 #endif
 
 	switch (args->mode & S_IFMT) {
@@ -1766,8 +1767,9 @@
 
 #ifdef DEBUG
 	if (ldebug(prctl))
-		printf(ARGS(prctl, "%d, %zd, %zd, %zd, %zd"), args->option,
-		    args->arg2, args->arg3, args->arg4, args->arg5);
+		printf(ARGS(prctl, "%d, %ju, %ju, %ju, %ju"), args->option,
+		    (uintmax_t)args->arg2, (uintmax_t)args->arg3,
+		    (uintmax_t)args->arg4, (uintmax_t)args->arg5);
 #endif
 
 	switch (args->option) {
Index: sys/compat/linux/linux_signal.c
===================================================================
--- sys/compat/linux/linux_signal.c
+++ sys/compat/linux/linux_signal.c
@@ -466,8 +466,8 @@
 #ifdef DEBUG
 		if (ldebug(rt_sigtimedwait))
 			printf(LMSG("linux_rt_sigtimedwait: "
-			    "incoming timeout (%zd/%zd)\n"),
-			    ltv.tv_sec, ltv.tv_usec);
+			    "incoming timeout (%jd/%jd)\n"),
+			    (intmax_t)ltv.tv_sec, (intmax_t)ltv.tv_usec);
 #endif
 		tv.tv_sec = (long)ltv.tv_sec;
 		tv.tv_usec = (suseconds_t)ltv.tv_usec;
Index: sys/compat/linux/linux_stats.c
===================================================================
--- sys/compat/linux/linux_stats.c
+++ sys/compat/linux/linux_stats.c
@@ -496,7 +496,7 @@
 {
 #ifdef DEBUG
 	if (ldebug(ustat))
-		printf(ARGS(ustat, "%zd, *"), args->dev);
+		printf(ARGS(ustat, "%ju, *"), (uintmax_t)args->dev);
 #endif
 
 	return (EOPNOTSUPP);