diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index cc57a3a..759604e 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -2070,8 +2070,8 @@
 
 	size = N_TTY_BUF_SIZE - tail;
 	n = eol - tail;
-	if (n > 4096)
-		n += 4096;
+	if (n > N_TTY_BUF_SIZE)
+		n += N_TTY_BUF_SIZE;
 	n += found;
 	c = n;