diff --git a/src/client.c b/src/client.c
index 9ce8f14c..2b9e397b 100644
--- a/src/client.c
+++ b/src/client.c
@@ -596,7 +596,7 @@ void client_send_reportxml(client_t *client, reportxml_t *report, document_domai
             xmlDocDumpMemory(doc, &buff, &len);
             content_type = "text/xml";
         } else {
-            char *json = xml2json_render_doc_simple(doc);
+            char *json = xml2json_render_doc_simple(doc, NULL);
             buff = xmlStrdup(XMLSTR(json));
             len = strlen(json);
             free(json);
diff --git a/src/xml2json.c b/src/xml2json.c
index 81cdb6c8..e10804a4 100644
--- a/src/xml2json.c
+++ b/src/xml2json.c
@@ -124,7 +124,7 @@ static void render_node(json_renderer_t *renderer, xmlDocPtr doc, xmlNodePtr nod
     render(renderer, doc, node, parent, cache);
 }
 
-char * xml2json_render_doc_simple(xmlDocPtr doc)
+char * xml2json_render_doc_simple(xmlDocPtr doc, const char *default_namespace)
 {
     struct xml2json_cache cache;
     json_renderer_t *renderer;
diff --git a/src/xml2json.h b/src/xml2json.h
index c49828b4..586c092f 100644
--- a/src/xml2json.h
+++ b/src/xml2json.h
@@ -13,6 +13,6 @@
 
 #include <libxml/tree.h>
 
-char * xml2json_render_doc_simple(xmlDocPtr doc);
+char * xml2json_render_doc_simple(xmlDocPtr doc, const char *default_namespace);
 
 #endif