diff --git a/membuffer/membuffer.h b/membuffer/membuffer.h
index 54d13cd..1ddda2e 100644
--- a/membuffer/membuffer.h
+++ b/membuffer/membuffer.h
@@ -39,7 +39,6 @@
 #define headerfile_picotools_membuffer_membuffer
 
 
-
 namespace PT
 {
 
@@ -106,8 +105,8 @@ public:
 
 	MemBuffer();
 	~MemBuffer();
-	//MemBuffer(const MemBuffer<ItemType, stack_size, heap_block_size> & arg);
-	//MemBuffer & operator=(const MemBuffer<ItemType, stack_size, heap_block_size> & arg);
+	MemBuffer(const MemBuffer<ItemType, stack_size, heap_block_size> & arg);
+	MemBuffer & operator=(const MemBuffer<ItemType, stack_size, heap_block_size> & arg);
 
 	void Append(ItemType item);
 	void Append(ItemType * item_array, size_t len);
@@ -411,6 +410,30 @@ MemBuffer<ItemType, stack_size, heap_block_size>::~MemBuffer()
 }
 
 
+template<class ItemType, size_t stack_size, size_t heap_block_size>
+MemBuffer<ItemType, stack_size, heap_block_size>::MemBuffer(const MemBuffer<ItemType, stack_size, heap_block_size> & arg)
+{
+	operator=(arg);
+}
+
+
+template<class ItemType, size_t stack_size, size_t heap_block_size>
+MemBuffer<ItemType, stack_size, heap_block_size> &
+MemBuffer<ItemType, stack_size, heap_block_size>::operator=(const MemBuffer<ItemType, stack_size, heap_block_size> & arg)
+{
+	if( size_used > 0 )
+		Clear();
+
+	ConstIterator i = arg.Begin();
+
+	for( ; i != arg.End() ; ++i)
+		Append(*i);
+
+return *this;
+}
+
+
+
 template<class ItemType, size_t stack_size, size_t heap_block_size>
 void MemBuffer<ItemType, stack_size, heap_block_size>::AddDynamicNode()
 {