diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 2524133..fcdd578 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -1640,7 +1640,8 @@
 * Requires: MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_ENABLED or
 *           MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_EPHEMERAL_ENABLED
 *
-* Comment this to disable support for early data.
+* Comment this to disable support for early data. If MBEDTLS_SSL_PROTO_TLS1_3
+* is not enabled, this option does not have any effect on the build.
 *
 * This feature is experimental, not completed and thus not ready for
 * production.