diff --git a/library/ssl_tls13_client.c b/library/ssl_tls13_client.c
index b154835..cd36ea8 100644
--- a/library/ssl_tls13_client.c
+++ b/library/ssl_tls13_client.c
@@ -2235,9 +2235,11 @@
     MBEDTLS_SSL_PROC_CHK(
         mbedtls_ssl_finish_handshake_msg(ssl, buf_len, 0));
 
-    /* Switch outbound back to handshake key after end_of_early_data */
-    mbedtls_ssl_set_outbound_transform(
-        ssl, ssl->handshake->transform_handshake);
+    /* TODO: Currently switch outbound back to handshake key in the case of
+     * MBEDTLS_SSL_CLIENT_CERTIFICATE. If we refine the coordinate function
+     * of client certificate state machine, we have to move the switch
+     * outbound function.
+     */
 
     mbedtls_ssl_handshake_set_state(ssl, MBEDTLS_SSL_CLIENT_CERTIFICATE);