$OpenBSD: patch-config_f_h,v 1.4 2009/09/07 09:10:55 sthen Exp $
--- config_f.h.orig	Thu Jun 25 13:10:56 2009
+++ config_f.h	Thu Jul 16 15:36:27 2009
@@ -143,7 +143,7 @@
  *		This can be much slower and no memory statistics will be
  *		provided.
  */
-#if defined(__MACHTEN__) || defined(PURIFY) || defined(MALLOC_TRACE) || defined(_OSD_POSIX) || defined(__MVS__)
+#if defined(__MACHTEN__) || defined(PURIFY) || defined(MALLOC_TRACE) || defined(_OSD_POSIX) || defined(__MVS__) || defined(__OpenBSD__)
 # define SYSMALLOC
 #else
 # undef SYSMALLOC