diff --git a/include/boost/smart_ptr/detail/sp_counted_base_cw_ppc.hpp b/include/boost/smart_ptr/detail/sp_counted_base_cw_ppc.hpp
index 58a69e6..1d58fbe 100644
--- a/include/boost/smart_ptr/detail/sp_counted_base_cw_ppc.hpp
+++ b/include/boost/smart_ptr/detail/sp_counted_base_cw_ppc.hpp
@@ -60,14 +60,10 @@ inline long atomic_decrement( register long * pw )
 {
     register int a;
 
+    __sync();
+
     asm
     {
-#if defined(__PPCZen__) || defined(__PPCe500__) || defined(__PPCe500v2__)
-    msync
-#else
-    sync
-#endif
-
 loop:
 
     lwarx   a, 0, pw