diff --git a/src/sha256.c b/src/sha256.c
index 0b931a8..3392fc0 100644
--- a/src/sha256.c
+++ b/src/sha256.c
@@ -7,9 +7,11 @@
  * See README.txt for an overview of the Vim source code.
  *
  * FIPS-180-2 compliant SHA-256 implementation
- * GPL by Christophe Devine.
+ * GPL by Christophe Devine, applies to older version.
  * Modified for md5deep, in public domain.
  * Modified For Vim, Mohsin Ahmed, http://www.cs.albany.edu/~mosh
+ * Mohsin Ahmed states this work is distributed under the VIM License or GPL,
+ * at your choice.
  *
  * Vim specific notes:
  * Functions exported by this file: