diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index 879e0e0..c8e2f4c 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -881,6 +881,10 @@
 int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl );
 int mbedtls_ssl_handshake_server_step( mbedtls_ssl_context *ssl );
 void mbedtls_ssl_handshake_wrapup( mbedtls_ssl_context *ssl );
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+int mbedtls_ssl_handshake_client_step_tls1_3( mbedtls_ssl_context *ssl );
+int mbedtls_ssl_handshake_server_step_tls1_3( mbedtls_ssl_context *ssl );
+#endif
 
 int mbedtls_ssl_send_fatal_handshake_failure( mbedtls_ssl_context *ssl );