diff --git a/Makefile b/Makefile
index 56a5d47..1124304 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: tmaze <marvin@42.fr>                       +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2018/04/04 10:51:59 by tmaze             #+#    #+#              #
-#    Updated: 2018/04/04 14:09:35 by tmaze            ###   ########.fr        #
+#    Updated: 2018/04/04 15:07:23 by tmaze            ###   ########.fr        #
 #                                                                              #
 #******************************************************************************#
 
@@ -16,12 +16,14 @@ CCSTD = -std=c99
 
 NAME = libft.a
 
-SRCS =	ft_isalpha.c \
+SRCS =	\
+		ft_isalpha.c \
 		ft_isdigit.c \
 		ft_isalnum.c \
 		ft_isascii.c \
 		ft_isprint.c \
-		ft_toupper.c
+		ft_toupper.c \
+		ft_tolower.c 
 OBJS = $(SRCS:.c=.o)
 INCLS = -I.
 
diff --git a/ft_tolower.c b/ft_tolower.c
new file mode 100644
index 0000000..312d28b
--- /dev/null
+++ b/ft_tolower.c
@@ -0,0 +1,18 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_tolower.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tmaze <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2018/04/04 14:24:13 by tmaze             #+#    #+#             */
+/*   Updated: 2018/04/04 14:24:34 by tmaze            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+int		ft_tolower(int c)
+{
+	return ((c >= 'A' && c <= 'Z') ? c + 32 : c);
+}