Issue #3920: Define _BSD_SOURCE on OpenBSD 4.4.
diff --git a/Misc/NEWS b/Misc/NEWS
index 0d86fe7..86383e2 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -34,6 +34,11 @@
   The original CWD is saved in `test_support.SAVEDCWD`.
   Thanks to Florent Xicluna who helped with the patch.
 
+Build
+-----
+
+- Issue #3920: Define _BSD_SOURCE on OpenBSD 4.4.
+
 
 What's New in Python 2.7 alpha 3?
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