diff --git a/libftprintf/ft_eoflags.c b/libftprintf/ft_eoflags.c
index 0bb580e..0b89451 100644
--- a/libftprintf/ft_eoflags.c
+++ b/libftprintf/ft_eoflags.c
@@ -6,7 +6,7 @@
 /*   By: gbaconni@student.42lausanne.ch             +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2022/04/26 10:13:59 by gbaconni          #+#    #+#             */
-/*   Updated: 2022/04/26 13:24:34 by gbaconni         ###   ########.fr       */
+/*   Updated: 2022/04/29 08:58:41 by gbaconni         ###   lausanne.ch       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -16,7 +16,7 @@ int	ft_eoflags(const char *s)
 {
 	int			ret;
 	int			i;
-	const char	*chars = "cspdiuxX%";
+	const char	*chars = SPECIFIERS;
 
 	ret = 0;
 	if (s == NULL)
diff --git a/libftprintf/ft_vprintf.c b/libftprintf/ft_vprintf.c
index 2f9580e..c64884e 100644
--- a/libftprintf/ft_vprintf.c
+++ b/libftprintf/ft_vprintf.c
@@ -6,7 +6,7 @@
 /*   By: gbaconni@student.42lausanne.ch             +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2022/01/20 11:43:52 by gbaconni          #+#    #+#             */
-/*   Updated: 2022/04/26 15:20:34 by gbaconni         ###   ########.fr       */
+/*   Updated: 2022/04/29 08:48:39 by gbaconni         ###   lausanne.ch       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -15,7 +15,7 @@
 int	ft_vprintf(char const *format, va_list ap)
 {
 	int			ret;
-	
+
 	ret = 0;
 	while (*format != 0)
 	{
diff --git a/libftprintf/ft_vprintf_decimal.c b/libftprintf/ft_vprintf_decimal.c
index a2a6dd5..cc7a017 100644
--- a/libftprintf/ft_vprintf_decimal.c
+++ b/libftprintf/ft_vprintf_decimal.c
@@ -6,7 +6,7 @@
 /*   By: gbaconni@student.42lausanne.ch             +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2022/01/20 11:55:02 by gbaconni          #+#    #+#             */
-/*   Updated: 2022/04/29 08:42:35 by gbaconni         ###   lausanne.ch       */
+/*   Updated: 2022/04/29 09:09:08 by gbaconni         ###   lausanne.ch       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -44,7 +44,7 @@ int	ft_vprintf_decimal(const char *format, va_list ap)
 	{
 		if (ft_isdigit(*f))
 			precision = precision * 10 + *f - '0';
-		if (ft_strchr("cspdiuxX%", *f) != NULL)
+		if (ft_strchr(SPECIFIERS, *f) != NULL)
 			break ;
 		f++;
 	}
@@ -52,7 +52,7 @@ int	ft_vprintf_decimal(const char *format, va_list ap)
 	if (precision > 0)
 	{
 		len = precision - ft_strlen(s);
-		while (len --> 0)
+		while (len-- > 0)
 		{
 			if (flags & F_ZERO)
 				ret += ft_putchar('0');
diff --git a/libftprintf/ft_vprintf_flags_bonus.c b/libftprintf/ft_vprintf_flags_bonus.c
index cd60b02..a45640e 100644
--- a/libftprintf/ft_vprintf_flags_bonus.c
+++ b/libftprintf/ft_vprintf_flags_bonus.c
@@ -6,7 +6,7 @@
 /*   By: gbaconni@student.42lausanne.ch             +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2022/04/25 13:15:32 by gbaconni          #+#    #+#             */
-/*   Updated: 2022/04/26 17:18:20 by gbaconni         ###   ########.fr       */
+/*   Updated: 2022/04/29 08:59:37 by gbaconni         ###   lausanne.ch       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -32,9 +32,9 @@ int	ft_vprintf_flags_bonus(const char *format, va_list ap)
 			ret |= F_SPACE;
 		else if (*f == '+')
 			ret |= F_PLUS;
-		else if (*f >= '0' && *f <= '9')
+		else if (ft_isdigit(*f))
 			break ;
-		if (*f == 'c' || *f == 's' || *f == 'p' || *f == 'd' || *f == 'i' || *f == 'u' || *f == 'x' || *f == 'X' || *f == '%')
+		if (ft_strchr(SPECIFIERS, *f) != NULL)
 			break ;
 		f++;
 	}
diff --git a/libftprintf/ft_vprintf_string.c b/libftprintf/ft_vprintf_string.c
index c0d6ee0..46690f5 100644
--- a/libftprintf/ft_vprintf_string.c
+++ b/libftprintf/ft_vprintf_string.c
@@ -6,7 +6,7 @@
 /*   By: gbaconni@student.42lausanne.ch             +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2022/01/20 11:56:37 by gbaconni          #+#    #+#             */
-/*   Updated: 2022/04/29 08:42:02 by gbaconni         ###   lausanne.ch       */
+/*   Updated: 2022/04/29 09:03:47 by gbaconni         ###   lausanne.ch       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -38,14 +38,14 @@ int	ft_vprintf_string(const char *format, va_list ap)
 	{
 		if (ft_isdigit(*f))
 			precision = precision * 10 + *f - '0';
-		if (ft_strchr("cspdiuxX%", *f) != NULL)
+		if (ft_strchr(SPECIFIERS, *f) != NULL)
 			break ;
 		f++;
 	}
 	if (precision > 0)
 	{
 		len = precision - ft_strlen(s);
-		while (len --> 0)
+		while (len-- > 0)
 			ret += ft_putchar(' ');
 	}
 	ret += ft_puts(s);
diff --git a/libftprintf/libftprintf.h b/libftprintf/libftprintf.h
index 38c3877..ee380d3 100644
--- a/libftprintf/libftprintf.h
+++ b/libftprintf/libftprintf.h
@@ -6,7 +6,7 @@
 /*   By: gbaconni@student.42lausanne.ch             +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2022/01/18 15:26:06 by gbaconni          #+#    #+#             */
-/*   Updated: 2022/04/26 10:41:36 by gbaconni         ###   ########.fr       */
+/*   Updated: 2022/04/29 08:56:40 by gbaconni         ###   lausanne.ch       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -23,6 +23,8 @@
 #  define NIL "(nil)"
 # endif
 
+# define SPECIFIERS	"cspdiuxX%"
+
 /* Helper */
 
 int		ft_eoflags(const char *s);