--- a/boost/lockfree/detail/tagged_ptr_dcas.hpp	Tue Jan 20 11:26:36 1970
+++ b/boost/lockfree/detail/tagged_ptr_dcas.hpp	Tue Jan 20 11:26:36 1970
@@ -24,7 +24,7 @@
     typedef std::size_t tag_t;
 
     /** uninitialized constructor */
-    tagged_ptr(void) BOOST_NOEXCEPT//: ptr(0), tag(0)
+    tagged_ptr(void) BOOST_NOEXCEPT: ptr(0)//, tag(0)
     {}
 
 #ifdef BOOST_NO_CXX11_DEFAULTED_FUNCTIONS