--- boost/smart_ptr/detail/sp_has_sync.hpp.orig	2011-11-07 10:03:44.000000000 -0500
+++ boost/smart_ptr/detail/sp_has_sync.hpp	2012-02-24 10:49:13.000000000 -0500
@@ -20,7 +20,9 @@
 //  are available.
 //
 
-#if defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( BOOST_SP_NO_SYNC )
+#ifndef BOOST_SP_NO_SYNC
+
+#if defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 )
 
 #define BOOST_SP_HAS_SYNC
 
@@ -54,4 +56,10 @@
 
 #endif // __GNUC__ * 100 + __GNUC_MINOR__ >= 401
 
+#if defined( __IBMCPP__ ) && ( __IBMCPP__ >= 1210 )
+#define BOOST_SP_HAS_SYNC
+#endif
+
+#endif // !defined( BOOST_SP_NO_SYNC )
+
 #endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED