diff --git a/Makefile b/Makefile
index da398f7..bc6ab2e 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: tmaze <marvin@42.fr>                       +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2018/04/04 10:51:59 by tmaze             #+#    #+#              #
-#    Updated: 2018/04/07 11:22:24 by tmaze            ###   ########.fr        #
+#    Updated: 2018/04/07 11:42:48 by tmaze            ###   ########.fr        #
 #                                                                              #
 #******************************************************************************#
 
@@ -50,7 +50,8 @@ SRCS =	\
 		ft_strnew.c   \
 		ft_strdel.c   \
 		ft_strclr.c   \
-		ft_striter.c
+		ft_striter.c  \
+		ft_striteri.c
 OBJS = $(SRCS:.c=.o)
 INCLS = -I.
 
diff --git a/ft_striter.c b/ft_striter.c
index 3b4a5c6..cecf2ad 100644
--- a/ft_striter.c
+++ b/ft_striter.c
@@ -6,7 +6,7 @@
 /*   By: tmaze <marvin@42.fr>                       +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2018/04/07 11:17:26 by tmaze             #+#    #+#             */
-/*   Updated: 2018/04/07 11:20:40 by tmaze            ###   ########.fr       */
+/*   Updated: 2018/04/07 11:41:57 by tmaze            ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -14,7 +14,7 @@
 
 void	ft_striter(char *s, void (*f)(char*))
 {
-	int	i;
+	unsigned int	i;
 
 	i = 0;
 	while (s[i])
diff --git a/ft_striteri.c b/ft_striteri.c
new file mode 100644
index 0000000..218eb6a
--- /dev/null
+++ b/ft_striteri.c
@@ -0,0 +1,22 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_striteri.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tmaze <marvin@42.fr>                       +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2018/04/07 11:36:12 by tmaze             #+#    #+#             */
+/*   Updated: 2018/04/07 11:48:32 by tmaze            ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+void	ft_striteri(char *s, void (*f)(unsigned int, char*))
+{
+	unsigned int	i;
+
+	i = -1;
+	while (s[++i])
+		(*f)(i, &s[i]);
+}