diff --git a/NEWS b/NEWS
index b56785a..9c1744b 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,8 @@
+0.5.22:
+
+This patch release explicitly requests the openat() interface via definition
+of _POSIX_C_SOURCE in translation units that need it.
+
 0.5.21:
 
 This patch release follows important enhancements in slibtool's library
diff --git a/project/tagver.mk b/project/tagver.mk
index 3d9d95c..18401a8 100644
--- a/project/tagver.mk
+++ b/project/tagver.mk
@@ -2,4 +2,4 @@ VER_NAMESPACE	= SLBT
 
 VER_MAJOR	= 0
 VER_MINOR	= 5
-VER_PATCH	= 21
+VER_PATCH	= 22