--- php7/ext/dom/document.c
+++ php7/ext/dom/document.c
@@ -27,6 +27,7 @@
 #if HAVE_LIBXML && HAVE_DOM
 #include "php_dom.h"
 #include <libxml/SAX.h>
+#include <libxml/xmlsave.h>
 #ifdef LIBXML_SCHEMAS_ENABLED
 #include <libxml/relaxng.h>
 #include <libxml/xmlschemas.h>
--- php7/ext/libxml/php_libxml.h
+++ php7/ext/libxml/php_libxml.h
@@ -39,6 +39,7 @@
 
 #include "zend_smart_str.h"
 #include <libxml/tree.h>
+#include <libxml/parser.h>
 
 #define LIBXML_SAVE_NOEMPTYTAG 1<<2