$NetBSD: patch-aa,v 1.18 2014/11/30 08:40:51 spz Exp $
--- mono/io-layer/collection.c.orig	2014-09-22 13:23:09.000000000 +0000
+++ mono/io-layer/collection.c
@@ -58,7 +58,11 @@ void _wapi_collection_init (void)
 
 #if defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
         if (set_stacksize == 0) {
+#ifdef PTHREAD_STACK_MIN
 			ret = pthread_attr_setstacksize (&attr, MAX (65536, PTHREAD_STACK_MIN));
+#else
+			ret = pthread_attr_setstacksize (&attr, 65536);
+#endif
 			g_assert (ret == 0);
         } else if (set_stacksize == 1) {
 			ret = pthread_attr_setstacksize (&attr, 131072);