diff --git a/src/document/dom/node.c b/src/document/dom/node.c
index 785cf628..87d41b61 100644
--- a/src/document/dom/node.c
+++ b/src/document/dom/node.c
@@ -236,9 +236,8 @@ init_dom_node_(unsigned char *file, int line,
 		int sort = (type == DOM_NODE_ATTRIBUTE);
 		int index;
 
-		assertm(list, "Adding node to bad parent",
-			get_dom_node_type_name(node->type),
-			get_dom_node_type_name(parent->type));
+		assertm(list, "Adding node %d to bad parent %d",
+			node->type, parent->type);
 
 		index = *list && (*list)->size > 0 && sort
 		      ? get_dom_node_map_index(*list, node) : -1;