diff --git a/Makefile b/Makefile
index 9bc6286..5d2c545 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: tmaze <marvin@42.fr>                       +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2018/04/04 10:51:59 by tmaze             #+#    #+#              #
-#    Updated: 2018/04/05 14:13:58 by tmaze            ###   ########.fr        #
+#    Updated: 2018/04/05 15:43:32 by tmaze            ###   ########.fr        #
 #                                                                              #
 #******************************************************************************#
 
@@ -17,6 +17,7 @@ CCSTD = -std=c99
 NAME = libft.a
 
 SRCS =	\
+		ft_memset.c  \
 		ft_strlen.c  \
 		ft_strdup.c  \
 		ft_strcpy.c  \
diff --git a/ft_isalpha.c b/ft_isalpha.c
index 14dce1a..81d4fdd 100644
--- a/ft_isalpha.c
+++ b/ft_isalpha.c
@@ -6,23 +6,23 @@
 /*   By: tmaze <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2018/04/04 10:56:47 by tmaze             #+#    #+#             */
-/*   Updated: 2018/04/04 11:23:21 by tmaze            ###   ########.fr       */
+/*   Updated: 2018/04/05 15:32:34 by tmaze            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "libft.h"
 
-int		ft_isupper(int c)
+static int		ft_isupper(int c)
 {
 	return (c >= 'A' && c <= 'Z');
 }
 
-int		ft_islower(int c)
+static int		ft_islower(int c)
 {
 	return (c >= 'a' && c <= 'z');
 }
 
-int		ft_isalpha(int c)
+int				ft_isalpha(int c)
 {
 	return (ft_islower(c) || ft_isupper(c));
 }
diff --git a/ft_memset.c b/ft_memset.c
new file mode 100644
index 0000000..58e6dbd
--- /dev/null
+++ b/ft_memset.c
@@ -0,0 +1,23 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_memset.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tmaze <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2018/04/05 15:22:55 by tmaze             #+#    #+#             */
+/*   Updated: 2018/04/05 16:19:06 by tmaze            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+void	*ft_memset(void *b, int c, size_t len)
+{
+    size_t i;
+
+    i = 0;
+    while (i < len)
+		*((char*)b + i++) = c;
+    return (b);
+}
diff --git a/libft.h b/libft.h
index 028da87..e0c947d 100644
--- a/libft.h
+++ b/libft.h
@@ -6,7 +6,7 @@
 /*   By: tmaze <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2018/04/04 10:40:01 by tmaze             #+#    #+#             */
-/*   Updated: 2018/04/05 13:51:17 by tmaze            ###   ########.fr       */
+/*   Updated: 2018/04/05 15:28:02 by tmaze            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -20,7 +20,7 @@
 ** fonctions obligatoires
 */
 
-void	*ft_memset(void *s, int c, size_t n);
+void	*ft_memset(void *b, int c, size_t len);
 void	ft_bzero(void *s, size_t n);
 void	*ft_memcpy(void *dest, const void *src, size_t n);
 void	*ft_memccpy(void *dest, const void *src, int c, size_t n);