libBLOC

diff --git a/tree/tree_add.c b/tree/tree_add.c
index 67397ba..bca8c7e 100644
--- a/tree/tree_add.c
+++ b/tree/tree_add.c
@@ -20,7 +20,6 @@
 #include <BLOC/object.h>
 #include <BLOC/tree.h>
 #include "../assert.h"
-#include "../object.h"
 #include "tree.h"
 
 /* Add a node to a tree recursively */
@@ -72,9 +71,8 @@ tree_add(Tree *tree, void *obj)
 {
 	ASSERT(tree);
 	ASSERT(obj);
-	struct ObjectHeader *header = object_header(obj);
-	ASSERT(header->magic == OBJECT_MAGIC);
-	if (tree->type && tree->type != header->type)
+	ASSERT(obj_verify(obj));
+	if (tree->type && tree->type != obj_type(obj))
 		return;
 
 	struct TreeNode *node;