diff --git a/ChangeLog b/ChangeLog
index 66a8ce9..5d6e408 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -41,6 +41,8 @@
      mbedtls_ctr_drbg_update() -> mbedtls_ctr_drbg_update_ret()
      mbedtls_hmac_drbg_update() -> mbedtls_hmac_drbg_update_ret()
    * Extend ECDH interface to enable alternative implementations.
+   * Add validation checks for input parameters to functions in the SHA-256
+     module.
 
 New deprecations
    * Deprecate mbedtls_ctr_drbg_update and mbedtls_hmac_drbg_update