diff --git a/ChangeLog b/ChangeLog
index e8a7f69..c797eb7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6,6 +6,11 @@
      (AES CTR, Camellia CTR, XTEA CBC) including the option to
 	 enable and disable individual modes when needed
 
+Changes
+   * Major argument / variable rewrite. Introduced use of size_t
+     instead of int for buffer lengths and loop variables for
+	 better unsigned / signed use
+
 = Version 0.99-pre4 released on 2011-04-01
 Features
    * Added support for PKCS#1 v2.1 encoding and thus support