diff --git a/ChangeLog b/ChangeLog
index 1c6e874..f954c95 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -53,6 +53,7 @@
    * Add a check for invalid private parameters in mbedtls_ecdsa_sign.
      Reported by Yolan Romailler.
    * Fix word size check in in pk.c to not depend on MBEDTLS_HAVE_INT64.
+   * Fix incorrect unit in benchmark output. #850
 
 Changes
    * Extend cert_write example program by options to set the CRT version