diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 93ca9b5..e3bae2c 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -1637,7 +1637,8 @@
 *
 * Enable support for RFC 8446 TLS 1.3 early data.
 *
-* Requires: MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_PSK_ENABLED or
+* Requires: MBEDTLS_SSL_SESSION_TICKETS and either
+*           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. If MBEDTLS_SSL_PROTO_TLS1_3
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 0804746..1ae441c 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -802,6 +802,15 @@
 #endif
 
 #if defined(MBEDTLS_SSL_EARLY_DATA) && defined(MBEDTLS_SSL_CLI_C)
+/* Define the status of early data.
+ * MBEDTLS_SSL_EARLY_DATA_STATUS_UNKNOWN : Initilized.
+ * MBEDTLS_SSL_EARLY_DATA_STATUS_INDICATION_SENT: Have sent early data
+ *  indication in client hello successfully.
+ * MBEDTLS_SSL_EARLY_DATA_STATUS_NOT_SENT: Have sent client hello without
+ *  data indication.
+ * MBEDTLS_SSL_EARLY_DATA_STATUS_REJECTED: Server side reject the early data.
+ * MBEDTLS_SSL_EARLY_DATA_STATUS_ACCEPTED: Server side accept the early data.
+ */
 #define MBEDTLS_SSL_EARLY_DATA_STATUS_UNKNOWN           0
 #define MBEDTLS_SSL_EARLY_DATA_STATUS_NOT_SENT          1
 #define MBEDTLS_SSL_EARLY_DATA_STATUS_INDICATION_SENT   2