diff --git a/usr.bin/killall/killall.c b/usr.bin/killall/killall.c
index aca0830c158..494a527d190 100644
--- a/usr.bin/killall/killall.c
+++ b/usr.bin/killall/killall.c
@@ -255,7 +255,8 @@ main(int ac, char **av)
 	if (tty) {
 		if (strncmp(tty, "/dev/", 5) == 0)
 			snprintf(buf, sizeof(buf), "%s", tty);
-		else if (strncmp(tty, "tty", 3) == 0)
+		else if (strncmp(tty, "tty", 3) == 0 ||
+		    strncmp(tty, "pts/", 4) == 0)
 			snprintf(buf, sizeof(buf), "/dev/%s", tty);
 		else
 			snprintf(buf, sizeof(buf), "/dev/tty%s", tty);