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-rw-r--r--miscutils/less.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/miscutils/less.c b/miscutils/less.c
index 0b0dc0c8b..19051f6f6 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -239,6 +239,7 @@ static void data_readlines(void) {
if(inp == NULL)
inp = (inp_stdin) ? bb_xfopen(CURRENT_TTY, "r") : stdin;
+ if(inp == NULL) bb_perror_msg_and_die("no tty");
if (flags & FLAG_N)
add_linenumbers();