diff --git a/pgrep.c b/pgrep.c
index 0c193093..9473a1ea 100644
--- a/pgrep.c
+++ b/pgrep.c
@@ -779,7 +779,7 @@ int main (int argc, char **argv)
 			if (errno==ESRCH)
 				 // gone now, which is OK
 			        continue;
-			xwarn(_("killing pid %ld failed"));
+			xwarn(_("killing pid %ld failed"), procs[i].num);
 		}
 	} else {
 		if (opt_count) {
diff --git a/vmstat.c b/vmstat.c
index 8fbe5455..5348cee5 100644
--- a/vmstat.c
+++ b/vmstat.c
@@ -356,7 +356,7 @@ static int diskpartition_format(const char *partition_name)
 	struct disk_stat *disks;
 	struct partition_stat *partitions, *current_partition = NULL;
 	unsigned long ndisks, j, k, npartitions;
-	const char format[] = "%20u %10llu %10u %10u\n";
+	const char format[] = "%20u %10llu %10u %10llu\n";
 
 	fDiskstat = fopen("/proc/diskstats", "rb");
 	if (!fDiskstat)
diff --git a/w.c b/w.c
index e3e9dbb0..072cdc09 100644
--- a/w.c
+++ b/w.c
@@ -392,7 +392,7 @@ int main(int argc, char **argv)
 		userlen = atoi(env_var);
 		if (userlen < 8 || userlen > USERSZ) {
 			xwarnx
-			    (_("User length environment PROCPS_USERLEN must be between 8 and %d, ignoring.\n"),
+			    (_("User length environment PROCPS_USERLEN must be between 8 and %zu, ignoring.\n"),
 			     USERSZ);
 			userlen = 8;
 		}