diff --git a/membuffer/membuffer.h b/membuffer/membuffer.h
index bc8f737..63e914f 100644
--- a/membuffer/membuffer.h
+++ b/membuffer/membuffer.h
@@ -156,6 +156,9 @@ private:
 	size_t size_allocated;				// how many memory is reserved
 	size_t size_reserved;				// memory reserved by reserve(), it is used by clear()
 
+	// used by ctors
+	void Initialize();
+
 	void add_dynamic_node();
 };
 
@@ -440,7 +443,7 @@ bool MemBuffer<item_type, stack_size, heap_block_size>::const_iterator::operator
 
 
 template<typename item_type, size_t stack_size, size_t heap_block_size>
-MemBuffer<item_type, stack_size, heap_block_size>::MemBuffer()
+void MemBuffer<item_type, stack_size, heap_block_size>::Initialize()
 {
 	size_reserved       = 0;
 	size_used           = 0;
@@ -452,6 +455,13 @@ MemBuffer<item_type, stack_size, heap_block_size>::MemBuffer()
 }
 
 
+template<typename item_type, size_t stack_size, size_t heap_block_size>
+MemBuffer<item_type, stack_size, heap_block_size>::MemBuffer()
+{
+	Initialize();
+}
+
+
 template<typename item_type, size_t stack_size, size_t heap_block_size>
 MemBuffer<item_type, stack_size, heap_block_size>::~MemBuffer()
 {
@@ -468,6 +478,7 @@ MemBuffer<item_type, stack_size, heap_block_size>::~MemBuffer()
 template<typename item_type, size_t stack_size, size_t heap_block_size>
 MemBuffer<item_type, stack_size, heap_block_size>::MemBuffer(const MemBuffer<item_type, stack_size, heap_block_size> & arg)
 {
+	Initialize();
 	operator=(arg);
 }