diff --git a/ChangeLog b/ChangeLog
index 9df31f9..a1b5e8a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -73,6 +73,8 @@
      mbedtls_ecp_muladd().
    * Removed individual mdX_hmac and shaX_hmac functions (use generic
      md_hmac functions from md.h)
+   * Removed mbedtls_timing_msleep(). Use mbedtls_timing_usleep() or a custom
+     waiting function.
    * Removed the PBKDF2 module (use PKCS5).
    * Removed POLARSSL_ERROR_STRERROR_BC (use mbedtls_strerror()).
    * Removed compat-1.2.h (helper for migrating from 1.2 to 1.3).