--- libaitio/inc/aitio.h	2012/09/10 12:03:55	1.25.2.3
+++ libaitio/inc/aitio.h	2012/09/17 11:27:54	1.25.2.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: aitio.h,v 1.25.2.3 2012/09/10 12:03:55 misho Exp $
+* $Id: aitio.h,v 1.25.2.4 2012/09/17 11:27:54 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -401,7 +401,7 @@ typedef union {
 #define IO_SOCKADDR_INIT	{ .ss = { 0 } }
 
 
-#define io_align(x, a)		(((x) + (a)) & ~(a))
+#define io_align(x, a)		(((x) + ((a) - 1)) & ~((a) - 1))
 
 
 // io_GetErrno() Get error code of last operation