diff --git a/configure b/configure
index 952b430..165b742 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 1.407 .
+# From configure.in Revision: 1.408 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.53 for python 2.3.
 #
@@ -1354,9 +1354,13 @@
   # of union __?sigval. Reported by Stuart Bishop.
   SunOS/5.6)
     define_xopen_source=no;;
-  # On UnixWare 7, u_short is never defined with _XOPEN_SOURCE,
+  # On UnixWare 7, u_long is never defined with _XOPEN_SOURCE,
+  # but used in /usr/include/netinet/tcp.h. Reported by Tim Rice.
+  OpenUNIX/8.0.0| UnixWare/7.1.[0-3])
+    define_xopen_source=no;;
+  # On OpenServer 5, u_short is never defined with _XOPEN_SOURCE,
   # but used in struct sockaddr.sa_family. Reported by Tim Rice.
-  OpenUNIX/8.0| UnixWare/7.1.[13])
+  SCO_SV/3.2)
     define_xopen_source=no;;
 esac