Add ChangeLog entry
diff --git a/ChangeLog b/ChangeLog
index 59561fd..948e4c3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,9 @@
 
 = mbed TLS x.x.x branch released xxxx-xx-xx
 
+Features
+   * Add support for fragmentation of outoing DTLS handshake messages.
+
 Bugfix
    * Fixes an issue with MBEDTLS_CHACHAPOLY_C which would not compile if
      MBEDTLS_ARC4_C and MBEDTLS_CIPHER_NULL_CIPHER weren't also defined. #1890