--- a/boost/circular_buffer/base.hpp	2009-07-18 13:13:35.000000000 -0700
+++ b/boost/circular_buffer/base.hpp	2009-07-22 16:04:01.000000000 -0700
@@ -1067,7 +1083,11 @@
              Linear (in the size of <code>cb</code>).
     */
     circular_buffer(const circular_buffer<T, Alloc>& cb)
-    : m_size(cb.size()), m_alloc(cb.get_allocator()) {
+    :
+#if BOOST_CB_ENABLE_DEBUG
+	debug_iterator_registry(),
+#endif
+    m_size(cb.size()), m_alloc(cb.get_allocator()) {
         initialize_buffer(cb.capacity());
         m_first = m_buff;
         BOOST_TRY {