diff --git a/srcs/part2/ft_substr.c b/srcs/part2/ft_substr.c
index c99c75f..6f3c47c 100644
--- a/srcs/part2/ft_substr.c
+++ b/srcs/part2/ft_substr.c
@@ -15,7 +15,9 @@
 */
 
 /*
-**	#include <libc.h>
+**	#include <unistd.h>
+**	#include <stdlib.h>
+**	#include <stdio.h>
 **
 **	char	*ft_substr(char const *s, unsigned int start, size_t len);
 **
@@ -61,10 +63,14 @@
 **	int		main(int ac, char **av)
 **	{
 **		char	*str;
+**		size_t	size;
+**		char	*ret;
 **
-**		str = "";
-**		size_t	size = 0;
-**		char	*ret = ft_substr(str, 5, size);
+**		str = NULL;
+**		size = 0;
+**		ret = ft_substr(str, 5, size);
+**		if (!ret)
+**			return (0);
 **		if (!ft_strncmp(ret, str + 5, size))
 **			printf("gloups\n");
 **		free(ret);