diff --git a/ChangeLog b/ChangeLog
index aaf34fc..4249de7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -135,6 +135,9 @@
    * Clarify the documentation of mbedtls_ssl_setup.
    * Use (void) when defining functions with no parameters. Contributed by
      Joris Aerts. #678
+   * Put the Cryptographic API outside of the XXX_ALT macro check, so
+     alternative header file will not need to redefined the same API,
+     and to force alternative implementer to use the same API.
 
 = mbed TLS 2.7.0 branch released 2018-02-03