diff --git a/src/pugixml.cpp b/src/pugixml.cpp
index 574bb08..364bee4 100644
--- a/src/pugixml.cpp
+++ b/src/pugixml.cpp
@@ -237,8 +237,6 @@ namespace pugi
 
 namespace pugi
 {
-	struct xml_document_struct;
-
 	static const uintptr_t xml_memory_page_alignment = 32;
 	static const uintptr_t xml_memory_page_pointer_mask = ~(xml_memory_page_alignment - 1);
 	static const uintptr_t xml_memory_page_name_allocated_mask = 16;
@@ -257,11 +255,6 @@ namespace pugi
 		{
 		}
 
-		~xml_allocator()
-		{
-			if (_root) _root->busy_size = _busy_size;
-		}
-
 		xml_memory_page* allocate_page(size_t data_size)
 		{
 		#ifdef __GNUC__
@@ -282,7 +275,7 @@ namespace pugi
 			xml_memory_page* page = new (page_memory) xml_memory_page();
 
 			page->memory = memory;
-			page->allocator = this;
+			page->allocator = _root->allocator;
 
 			return page;
 		}