Index: boost/dynamic_bitset/dynamic_bitset.hpp
===================================================================
--- boost/dynamic_bitset/dynamic_bitset.hpp	(revision 78800)
+++ boost/dynamic_bitset/dynamic_bitset.hpp	(working copy)
@@ -39,6 +39,7 @@
 #include "boost/static_assert.hpp"
 #include "boost/limits.hpp"
 #include "boost/pending/lowest_bit.hpp"
+#include "boost/move/move.hpp"
 
 
 namespace boost {
@@ -207,6 +208,17 @@
     void swap(dynamic_bitset& b);
     dynamic_bitset& operator=(const dynamic_bitset& b);
 
+#   ifndef BOOST_NO_RVALUE_REFERENCES
+    //==========================================================================
+    //= Move semantics
+    //==========================================================================
+
+    dynamic_bitset(dynamic_bitset&& src);
+
+    dynamic_bitset& operator = (dynamic_bitset&& src) ;
+    //==========================================================================
+#   endif // BOOST_NO_RVALUE_REFERENCES
+
     allocator_type get_allocator() const;
 
     // size changing operations
@@ -633,7 +645,27 @@
     return *this;
 }
 
+#   ifndef BOOST_NO_RVALUE_REFERENCES
+
+// Move semantics
 template <typename Block, typename Allocator>
+inline dynamic_bitset<Block, Allocator>::dynamic_bitset(dynamic_bitset<Block, Allocator>&& src)
+	: m_bits(boost::move(src.m_bits)), m_num_bits(src.m_num_bits)
+{
+	src.m_num_bits = 0;
+}
+
+template <typename Block, typename Allocator>
+inline dynamic_bitset<Block, Allocator>& dynamic_bitset<Block, Allocator>::
+	operator = (dynamic_bitset<Block, Allocator>&& src) 
+{ 
+	swap(src);
+	return *this; 
+}
+
+#   endif // BOOST_NO_RVALUE_REFERENCES
+
+template <typename Block, typename Allocator>
 inline typename dynamic_bitset<Block, Allocator>::allocator_type
 dynamic_bitset<Block, Allocator>::get_allocator() const
 {