diff --git a/common_zarch.h b/common_zarch.h
index b5503a7a4..442bae821 100644
--- a/common_zarch.h
+++ b/common_zarch.h
@@ -34,9 +34,8 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define COMMON_ZARCH
 
 #define MB   
-//__asm__ __volatile__ ("dmb  ish" : : : "memory")
 #define WMB  
-//__asm__ __volatile__ ("dmb  ishst" : : : "memory")
+#define RMB
 
 
 #define INLINE inline