Index: generic/nsfEnumerationType.c
===================================================================
diff -u -N -ra2021fcacd45bfbbe0d2dc11061e2a374c49726f -r6a52879a99a2fd5bc2e987d5b1149f69d35f02d9
--- generic/nsfEnumerationType.c	(.../nsfEnumerationType.c)	(revision a2021fcacd45bfbbe0d2dc11061e2a374c49726f)
+++ generic/nsfEnumerationType.c	(.../nsfEnumerationType.c)	(revision 6a52879a99a2fd5bc2e987d5b1149f69d35f02d9)
@@ -1,8 +1,9 @@
 /*
  * nsfEnumerationType.c --
  *
- *      Provide an API for registering enumeration types
- *      and obtaining their domains.
+ *      Provide an API for registering enumeration types and obtaining their
+ *      domains. Enumeration types are shared by all threads/interps. Access
+ *      is governed by a mutex lock.
  *
  * Copyright (C) 2014 Gustaf Neumann
  * Copyright (C) 2016 Stefan Sobernig