diff --git a/Makefile b/Makefile
index 6e0274e..4ff2061 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: kcolin <marvin@42.fr>                      +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2024/10/14 13:43:59 by kcolin            #+#    #+#              #
-#    Updated: 2024/10/16 10:46:46 by kcolin           ###   ########.fr        #
+#    Updated: 2024/10/16 13:22:00 by kcolin           ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -27,7 +27,8 @@ SOURCES = ft_isalpha.c \
 	ft_toupper.c \
 	ft_tolower.c \
 	ft_strchr.c \
-	ft_strrchr.c
+	ft_strrchr.c \
+	ft_strncmp.c
 OBJECTS = $(SOURCES:.c=.o)
 CC = gcc
 
diff --git a/ft_strncmp.c b/ft_strncmp.c
new file mode 100644
index 0000000..1e292c5
--- /dev/null
+++ b/ft_strncmp.c
@@ -0,0 +1,48 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strncmp.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/16 13:23:17 by kcolin            #+#    #+#             */
+/*   Updated: 2024/10/16 13:44:38 by kcolin           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+int	ft_strncmp(const char *s1, const char *s2, t_size n)
+{
+	t_size	i;
+
+	i = 0;
+	while (s1[i] != '\0' && s2[i] != 0)
+	{
+		if (i >= n)
+			return (0);
+		if (s1[i] != s2[i])
+			break ;
+		i++;
+	}
+	return ((unsigned char)s1[i] - (unsigned char)s2[i]);
+}
+
+/*
+#include <stdio.h>
+#include <string.h>
+
+int	main(int argc, char **argv)
+{
+	t_size	cmp_len;
+
+	cmp_len = 9;
+	if (argc > 2)
+	{
+		printf("mine: %d\tlib: %d\n",
+			ft_strncmp(argv[1], argv[2], cmp_len),
+			strncmp(argv[1], argv[2], cmp_len));
+	}
+	return (0);
+}
+*/
diff --git a/libft.h b/libft.h
index c287d7f..2eb7506 100644
--- a/libft.h
+++ b/libft.h
@@ -6,7 +6,7 @@
 /*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/10/15 10:11:54 by kcolin            #+#    #+#             */
-/*   Updated: 2024/10/16 10:34:08 by kcolin           ###   ########.fr       */
+/*   Updated: 2024/10/16 13:23:08 by kcolin           ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -35,5 +35,6 @@ int		ft_tolower(int c);
 
 char	*ft_strchr(const char *s, int c);
 char	*ft_strrchr(const char *s, int c);
+int		ft_strncmp(const char *s1, const char *s2, t_size n);
 
 #endif