diff --git a/configure b/configure
index d47a098..13303e3 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Revision: 1.401 .
+# From configure.in Revision: 1.402 .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.53 for python 2.3.
 #
@@ -1252,6 +1252,15 @@
 _ACEOF
 
 
+# The later defininition of _XOPEN_SOURCE and _POSIX_C_SOURCE disables
+# certain features on NetBSD, so we need _NETBSD_SOURCE to re-enable
+# them.
+
+cat >>confdefs.h <<\_ACEOF
+#define _NETBSD_SOURCE 1
+_ACEOF
+
+
 define_xopen_source=yes
 
 # Arguments passed to configure.