diff --git a/lib/gnl/get_next_line.c b/lib/gnl/get_next_line.c
index 78e3ea2..d31c378 100644
--- a/lib/gnl/get_next_line.c
+++ b/lib/gnl/get_next_line.c
@@ -15,6 +15,7 @@
 char	*ft_read_to_left_str(int fd, char *left_str)
 {
 	char	*buff;
+	char	*tmp;
 	int		rd_bytes;
 
 	buff = malloc((BUFFER_SIZE + 1) * sizeof(char));
@@ -33,7 +34,9 @@ char	*ft_read_to_left_str(int fd, char *left_str)
 		buff[rd_bytes] = '\0';
 		if (!left_str)
 			left_str = ft_strdup("");
-		left_str = ft_strjoin(left_str, buff);
+		tmp = left_str;
+		left_str = ft_strjoin(tmp, buff);
+		free(tmp);
 	}
 	free(buff);
 	return (left_str);