diff --git a/include/asm-ia64/system.h b/include/asm-ia64/system.h
index 65db43c..fc9677b 100644
--- a/include/asm-ia64/system.h
+++ b/include/asm-ia64/system.h
@@ -98,12 +98,11 @@
 #endif
 
 /*
- * XXX check on these---I suspect what Linus really wants here is
+ * XXX check on this ---I suspect what Linus really wants here is
  * acquire vs release semantics but we can't discuss this stuff with
  * Linus just yet.  Grrr...
  */
 #define set_mb(var, value)	do { (var) = (value); mb(); } while (0)
-#define set_wmb(var, value)	do { (var) = (value); mb(); } while (0)
 
 #define safe_halt()         ia64_pal_halt_light()    /* PAL_HALT_LIGHT */