diff --git a/libft/Makefile b/libft/Makefile
index ceefef68..d1c60d06 100644
--- a/libft/Makefile
+++ b/libft/Makefile
@@ -38,6 +38,7 @@ btree/btree_del.c\
 btree/btree_delone.c\
 btree/btree_insert_data.c\
 btree/btree_level_count.c\
+btree/btree_map.c\
 btree/btree_print.c\
 btree/btree_search_item.c\
 char/ft_isalnum.c\
@@ -114,6 +115,7 @@ math/ft_lltoa_base.c\
 math/ft_uilen.c\
 math/ft_uitoa_base.c\
 math/ft_ulltoa_base.c\
+math/id.c\
 mem/ft_bzero.c\
 mem/ft_memalloc.c\
 mem/ft_memccpy.c\
diff --git a/libft/includes/btree.h b/libft/includes/btree.h
index 4b3fd15d..0650090b 100644
--- a/libft/includes/btree.h
+++ b/libft/includes/btree.h
@@ -6,7 +6,7 @@
 /*   By: jhalford <jack@crans.org>                  +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2016/11/16 11:13:15 by jhalford          #+#    #+#             */
-/*   Updated: 2016/12/05 11:53:30 by jhalford         ###   ########.fr       */
+/*   Updated: 2017/03/07 12:16:03 by wescande         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -36,7 +36,7 @@ typedef struct s_btree		t_btree;
 typedef struct s_printdata	t_printdata;
 
 t_btree	*btree_create_node(void const *item, size_t content_size);
-t_btree	*btree_map(t_btree *root, void *(*f)(void *))
+t_btree	*btree_map(t_btree *root, void *(*f)(void *));
 void	btree_insert_data(
 		t_btree **root,
 		void *item,