diff --git a/usr.bin/script/script.c b/usr.bin/script/script.c
--- a/usr.bin/script/script.c
+++ b/usr.bin/script/script.c
@@ -327,8 +327,12 @@
 
 		if (n > 0 && FD_ISSET(STDIN_FILENO, &rfd)) {
 			cc = read(STDIN_FILENO, ibuf, BUFSIZ);
-			if (cc < 0)
+			if (cc < 0) {
+				(void)close(master);
+				master = -1;
+
 				break;
+			}
 			if (cc == 0) {
 				if (tcgetattr(master, &stt) == 0 &&
 				    (stt.c_lflag & ICANON) != 0) {
@@ -470,7 +474,8 @@
 		}
 	}
 	(void)fclose(fscript);
-	(void)close(master);
+	if (master >= 0)
+		(void)close(master);
 	exit(eno);
 }