diff --git a/include/boost/smart_ptr/detail/sp_counted_base_aix.hpp b/include/boost/smart_ptr/detail/sp_counted_base_aix.hpp
index a17e6cc..0208678 100644
--- a/include/boost/smart_ptr/detail/sp_counted_base_aix.hpp
+++ b/include/boost/smart_ptr/detail/sp_counted_base_aix.hpp
@@ -21,11 +21,15 @@
 //
 
 #include <boost/detail/sp_typeinfo.hpp>
+#include <builtins.h>
 #include <sys/atomic_op.h>
 
 namespace boost
 {
 
+namespace detail
+{
+
 inline void atomic_increment( int32_t* pw )
 {
     // ++*pw;
@@ -39,9 +43,9 @@ inline int32_t atomic_decrement( int32_t * pw )
 
     int32_t originalValue;
 
-    __asm__ __volatile__( "sync" );
+    __lwsync();
     originalValue = fetch_and_add( pw, -1 );
-    __asm__ __volatile__( "isync" );
+    __isync();
 
     return (originalValue - 1);
 }
@@ -59,9 +63,6 @@ inline int32_t atomic_conditional_increment( int32_t * pw )
     }
 }
 
-namespace detail
-{
-
 class sp_counted_base
 {
 private: