diff --git a/include/boost/smart_ptr/detail/atomic_count.hpp b/include/boost/smart_ptr/detail/atomic_count.hpp
index e0cbe26..456b2db 100644
--- a/include/boost/smart_ptr/detail/atomic_count.hpp
+++ b/include/boost/smart_ptr/detail/atomic_count.hpp
@@ -76,12 +76,12 @@
 #elif !defined( BOOST_NO_CXX11_HDR_ATOMIC )
 # include <boost/smart_ptr/detail/atomic_count_std_atomic.hpp>
 
-#elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) && !defined( __PATHSCALE__ )
-# include <boost/smart_ptr/detail/atomic_count_gcc_x86.hpp>
-
 #elif defined( BOOST_SP_HAS_SYNC_INTRINSICS )
 # include <boost/smart_ptr/detail/atomic_count_sync.hpp>
 
+#elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) && !defined( __PATHSCALE__ )
+# include <boost/smart_ptr/detail/atomic_count_gcc_x86.hpp>
+
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
 # include <boost/smart_ptr/detail/atomic_count_win32.hpp>
 
diff --git a/include/boost/smart_ptr/detail/atomic_count_gcc_x86.hpp b/include/boost/smart_ptr/detail/atomic_count_gcc_x86.hpp
index 100c9cf..30a73e3 100644
--- a/include/boost/smart_ptr/detail/atomic_count_gcc_x86.hpp
+++ b/include/boost/smart_ptr/detail/atomic_count_gcc_x86.hpp
@@ -13,6 +13,8 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
+
 #if defined(BOOST_SP_REPORT_IMPLEMENTATION)
 
 #include <boost/config/pragma_message.hpp>
@@ -20,6 +22,8 @@ BOOST_PRAGMA_MESSAGE("Using g++/x86 atomic_count")
 
 #endif
 
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 
diff --git a/include/boost/smart_ptr/detail/atomic_count_sync.hpp b/include/boost/smart_ptr/detail/atomic_count_sync.hpp
index 81d7d65..c65d1e9 100644
--- a/include/boost/smart_ptr/detail/atomic_count_sync.hpp
+++ b/include/boost/smart_ptr/detail/atomic_count_sync.hpp
@@ -15,6 +15,8 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/cstdint.hpp>
+
 #if defined( __ia64__ ) && defined( __INTEL_COMPILER )
 # include <ia64intrin.h>
 #endif
@@ -36,7 +38,9 @@ class atomic_count
 {
 public:
 
-    explicit atomic_count( long v ) : value_( v ) {}
+    explicit atomic_count( long v ) : value_( static_cast< boost::int_least32_t >( v ) )
+    {
+    }
 
     long operator++()
     {
@@ -58,7 +62,7 @@ private:
     atomic_count(atomic_count const &);
     atomic_count & operator=(atomic_count const &);
 
-    mutable long value_;
+    mutable boost::int_least32_t value_;
 };
 
 } // namespace detail