$OpenBSD$
--- source/shared_lib/sources/platform/posix/socket.cpp.orig	Sun Apr 10 15:49:01 2011
+++ source/shared_lib/sources/platform/posix/socket.cpp	Sun Apr 10 15:49:51 2011
@@ -13,6 +13,10 @@
 #include <cstdlib>
 #include <stdexcept>
 
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL	0
+#endif
+
 #if defined(HAVE_SYS_IOCTL_H) || defined(__linux__)
   #define BSD_COMP /* needed for FIONREAD on Solaris2 */
   #include <sys/ioctl.h>