diff --git a/Makefile b/Makefile
index 491ad4a..e1bdbc8 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: tmaze <tmaze@student.42.fr>                +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2018/04/07 12:47:06 by tmaze             #+#    #+#              #
-#    Updated: 2018/04/09 10:11:06 by tmaze            ###   ########.fr        #
+#    Updated: 2018/04/09 10:22:58 by tmaze            ###   ########.fr        #
 #                                                                              #
 #******************************************************************************#
 
@@ -19,7 +19,7 @@ NAME = libft.a
 SRCS =	ft_memset.c ft_bzero.c ft_memcpy.c ft_memccpy.c ft_memmove.c ft_memchr.c ft_memcmp.c ft_strlen.c ft_strdup.c ft_strcpy.c ft_strncpy.c ft_strcat.c ft_strncat.c ft_strlcat.c ft_strchr.c ft_strrchr.c ft_strstr.c ft_strnstr.c ft_strcmp.c ft_strncmp.c ft_atoi.c ft_isalpha.c ft_isdigit.c ft_isalnum.c ft_isascii.c ft_isprint.c ft_toupper.c ft_tolower.c \
 		ft_memalloc.c ft_memdel.c ft_strnew.c ft_strdel.c ft_strclr.c ft_striter.c ft_striteri.c ft_strmap.c ft_strmapi.c ft_strequ.c ft_strnequ.c ft_strsub.c ft_strjoin.c ft_strtrim.c ft_strsplit.c ft_itoa.c ft_putchar.c ft_putstr.c ft_putendl.c ft_putnbr.c ft_putchar_fd.c ft_putstr_fd.c ft_putendl_fd.c ft_putnbr_fd.c\
 		ft_lstnew.c ft_lstdelone.c ft_lstdel.c ft_lstadd.c ft_lstiter.c ft_lstmap.c \
-		ft_isupper.c
+		ft_isupper.c ft_islower.c
 
 OBJS = $(SRCS:.c=.o)
 INCLS = -I.
diff --git a/ft_isalpha.c b/ft_isalpha.c
index 2e7a33d..2e24e50 100644
--- a/ft_isalpha.c
+++ b/ft_isalpha.c
@@ -6,18 +6,13 @@
 /*   By: tmaze <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2018/04/04 10:56:47 by tmaze             #+#    #+#             */
-/*   Updated: 2018/04/09 10:10:00 by tmaze            ###   ########.fr       */
+/*   Updated: 2018/04/09 10:21:34 by tmaze            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "libft.h"
 
-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_islower.c b/ft_islower.c
new file mode 100644
index 0000000..a6a6147
--- /dev/null
+++ b/ft_islower.c
@@ -0,0 +1,18 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_islower.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tmaze <tmaze@student.42.fr>                +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2018/04/09 10:20:43 by tmaze             #+#    #+#             */
+/*   Updated: 2018/04/09 10:21:23 by tmaze            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+int	ft_islower(int c)
+{
+	return (c >= 'a' && c <= 'z');
+}