diff --git a/sys/ia64/include/param.h b/sys/ia64/include/param.h
index 1813d339c67..cbe76f86d95 100644
--- a/sys/ia64/include/param.h
+++ b/sys/ia64/include/param.h
@@ -58,7 +58,7 @@
  *
  */
 #ifndef _ALIGNBYTES
-#define	_ALIGNBYTES		7
+#define	_ALIGNBYTES		15
 #endif
 #ifndef _ALIGN
 #define	_ALIGN(p)		(((u_long)(p) + _ALIGNBYTES) &~ _ALIGNBYTES)