diff --git a/ChangeLog b/ChangeLog
index 8f7843dc6b..6e96fcd434 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,10 @@ mbed TLS ChangeLog (Sorted per branch, date)
 
 = mbed TLS 2.1.x released xxxx-xx-xx
 
+Security
+   * Verify results of RSA private key operations to defend
+     against Bellcore glitch attack.
+
 Bugfix
    * Fix ssl_parse_record_header() to silently discard invalid DTLS records
      as recommended in RFC 6347 Section 4.1.2.7.