diff --git a/ChangeLog b/ChangeLog
index e503d7562..bbb967143 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -10,6 +10,8 @@ Bugfix
      when GCM is used. #441
    * Fix for key exchanges based on ECDH-RSA or ECDH-ECDSA which weren't
      enabled unless others were also present. Found by David Fernandez. #428
+   * Fixed cert_app sample program for debug output and for use when no root
+     certificates are provided.
 
 = mbed TLS 2.1.5 branch released 2016-06-28