Add ChangeLog entry for #1257 - key_app_writer writes invalid ASN.1
diff --git a/ChangeLog b/ChangeLog
index 1e2f9b8..46d60e1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,8 @@
Philippe Antoine.
* Clarify documentation for mbedtls_ssl_write() to include 0 as a valid
return value. Found by @davidwu2000. #839
+ * Fix the key_app_writer example which was writing a leading zero byte which
+ was creating an invalid ASN.1 tag. Found by Aryeh R. Fixes #1257.
= mbed TLS 2.7.4 branch released 2018-06-18