Hello, I think that the code (libdom/include/dom/core/document.h) error, define the four parameters, and should be five? dom_document_rename_node (struct dom_document * doc, struct dom_node * node, dom_string * namespace, dom_string * qname, struct dom_node ** result) # define dom_document_rename_node (d, n, ns, q, r) dom_document_rename_node (\ (dom_document *) (d), (dom_string *) (ns), \ (dom_string *) (q), (dom_node **) (r))