diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 41bb9c5..c02ff58 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -243,6 +243,9 @@
 /* Maximum size in bytes of list in supported elliptic curve ext., RFC 4492 */
 #define MBEDTLS_SSL_MAX_CURVE_LIST_LEN         65535
 
+/* Maximum amount of early data to buffer on the server. */
+#define MBEDTLS_SSL_MAX_EARLY_DATA             1024
+
 #define MBEDTLS_RECEIVED_SIG_ALGS_SIZE         20
 
 #if defined(MBEDTLS_SSL_HANDSHAKE_WITH_CERT_ENABLED)
diff --git a/library/ssl_tls13_generic.c b/library/ssl_tls13_generic.c
index 48e3675..5f89593 100644
--- a/library/ssl_tls13_generic.c
+++ b/library/ssl_tls13_generic.c
@@ -1080,6 +1080,14 @@
 
 #endif /* MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED */
 
+#if defined(MBEDTLS_SSL_EARLY_DATA)
+void mbedtls_ssl_conf_early_data( mbedtls_ssl_config *conf,
+                                  int early_data_enabled )
+{
+    conf->early_data_enabled = early_data;
+}
+#endif /* MBEDTLS_SSL_EARLY_DATA */
+
 /*
  *
  * STATE HANDLING: Incoming Finished message.