# define WIN32SCK_IS_STDSCK /* don't pull in custom wsock layer */
#endif
-/* In Tru64 use the 4.4BSD struct msghdr, not the 4.3 one */
-#if defined(__osf__) && defined(__alpha) && !defined(_SOCKADDR_LEN)
-# define _SOCKADDR_LEN
+/* In Tru64 use the 4.4BSD struct msghdr, not the 4.3 one.
+ * This is important for using IPv6.
+ * For OSF/1 3.2, however, defining _SOCKADDR_LEN would be
+ * a bad idea since it breaks send() and recv(). */
+#if defined(__osf__) && defined(__alpha) && !defined(_SOCKADDR_LEN) && !defined(DEC_OSF1_3_X)
+# define _SOCKADDR_LEN
#endif
#if defined(HAS_SOCKET) && !defined(VMS) && !defined(WIN32) /* VMS/WIN32 handle sockets via vmsish.h/win32.h */