diff --git a/ChangeLog b/ChangeLog
index 99cbc0ab1..cdf079ce9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2012-02-01  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/fs/zfs/zfscrypt.c: Add link to documentation.
+
 2012-02-01  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/commands/videotest.c (grub_cmd_videotest): Fix subset
diff --git a/grub-core/fs/zfs/zfscrypt.c b/grub-core/fs/zfs/zfscrypt.c
index 63380f66a..f8815c918 100644
--- a/grub-core/fs/zfs/zfscrypt.c
+++ b/grub-core/fs/zfs/zfscrypt.c
@@ -44,6 +44,11 @@
 
 GRUB_MOD_LICENSE ("GPLv3+");
 
+/*
+  Mostly based on following article: 
+  https://blogs.oracle.com/darren/entry/zfs_encryption_what_is_on
+ */
+
 enum grub_zfs_algo
   {
     GRUB_ZFS_ALGO_CCM,