Adapt ChangeLog
diff --git a/ChangeLog b/ChangeLog
index f155a02..37628c7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -84,6 +84,7 @@
      underlying OS actually guarantees.
    * Ciphersuites based on 3DES now have the lowest priority by default when
      they are enabled.
+   * Replace multiple uses of MD2 by SHA-256 in X.509 test suite. Fixes #821.
 
 = mbed TLS 2.7.9 branch released 2018-12-21