diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 83f2b3c..14ffef2 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -1699,11 +1699,24 @@
 }
 
 #if defined(MBEDTLS_SSL_EARLY_DATA)
+#if defined(MBEDTLS_SSL_CLI_C)
 void mbedtls_ssl_tls13_conf_early_data( mbedtls_ssl_config *conf,
                                         int early_data_enabled )
 {
     conf->early_data_enabled = early_data_enabled;
 }
+#endif /* MBEDTLS_SSL_CLI_C */
+
+#if defined(MBEDTLS_SSL_SRV_C)
+void mbedtls_ssl_tls13_conf_max_early_data_size(
+         mbedtls_ssl_config *conf, uint32_t max_early_data_size )
+{
+    conf->max_early_data_size =
+        max_early_data_size < MBEDTLS_SSL_MAX_EARLY_DATA_SIZE ?
+                        max_early_data_size : MBEDTLS_SSL_MAX_EARLY_DATA_SIZE;
+}
+#endif /* MBEDTLS_SSL_SRV_C */
+
 #endif /* MBEDTLS_SSL_EARLY_DATA */
 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */