diff --git a/configure/CONFIG_NTYPES_VERSION b/configure/CONFIG_NTYPES_VERSION
index 0f768b8..9940356 100644
--- a/configure/CONFIG_NTYPES_VERSION
+++ b/configure/CONFIG_NTYPES_VERSION
@@ -1,3 +1,12 @@
+# Version number for the Normative Types API and shared library
+
 EPICS_NTYPES_MAJOR_VERSION = 6
 EPICS_NTYPES_MINOR_VERSION = 0
-EPICS_NTYPES_MAINTENANCE_VERSION = 0
+EPICS_NTYPES_MAINTENANCE_VERSION = 1
+
+# Development flag, set to zero for release versions
+
+EPICS_NTYPES_DEVELOPMENT_FLAG = 1
+
+# Immediately after a release the MAINTENANCE_VERSION
+# will be incremented and the DEVELOPMENT_FLAG set to 1