diff --git a/Makefile b/Makefile
index 4615246..8d0a8a4 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 12:34:54 by tmaze            ###   ########.fr        #
+#    Updated: 2018/04/05 13:16:24 by tmaze            ###   ########.fr        #
 #                                                                              #
 #******************************************************************************#
 
@@ -28,6 +28,7 @@ SRCS =	\
 		ft_strstr.c  \
 		ft_strnstr.c \
 		ft_strcmp.c  \
+		ft_strncmp.c \
 		ft_isalpha.c \
 		ft_isdigit.c \
 		ft_isalnum.c \
diff --git a/ft_strncmp.c b/ft_strncmp.c
new file mode 100644
index 0000000..e4658b7
--- /dev/null
+++ b/ft_strncmp.c
@@ -0,0 +1,28 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strncmp.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tmaze <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2018/04/05 13:04:21 by tmaze             #+#    #+#             */
+/*   Updated: 2018/04/05 13:15:51 by tmaze            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+int	ft_strncmp(const char *s1, const char *s2, size_t n)
+{
+	int i;
+	int diff;
+
+	i = 1;
+	diff = s1[0] - s2[0];
+	while ((unsigned int)i < n && diff == 0 && s1[i - 1] && s2[i - 1])
+	{
+		diff = s1[i] - s2[i];
+		i++;
+	}
+	return (diff);
+}
diff --git a/libft.h b/libft.h
index f403b25..907f129 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 11:39:51 by tmaze            ###   ########.fr       */
+/*   Updated: 2018/04/05 13:11:35 by tmaze            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -39,7 +39,7 @@ char	*ft_strrchr(const char *s, int c);
 char	*ft_strstr(const char *haystack, const char *needle);
 char	*ft_strnstr(const char *haystack, const char *needle, size_t len);
 int		ft_strcmp(const char *s1, const char *s2);
-int		ft_strncmp(const char *s1, const char *s2);
+int		ft_strncmp(const char *s1, const char *s2, size_t n);
 int		ft_atoi(const char *nptr);
 int		ft_isalpha(int c);
 int		ft_isdigit(int c);