diff --git a/ChangeLog.d/add-milliseconds-time-api.txt b/ChangeLog.d/add-milliseconds-time-api.txt
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+API changes
+   * Add `mbedtls_ms_time` function, `mbedtls_ms_time_t` type to get
+     milliseconds. That is required for TLS 1.3 ticket lifetime. And
+     `mbedtls_ms_time` allows alternative implementation with
+     `MBEDTLS_PLATFORM_MS_TIME_ALT`, `MBEDTLS_PLATFORM_MS_TIME_TYPE_MACRO` and
+     `MBEDTLS_PRINTF_MS_TIME`.
+