diff --git a/library/ssl_tls13_client.c b/library/ssl_tls13_client.c
index a0f0c9c..b64d326 100644
--- a/library/ssl_tls13_client.c
+++ b/library/ssl_tls13_client.c
@@ -1620,7 +1620,7 @@
  */
 static int ssl_tls13_write_client_finished( mbedtls_ssl_context *ssl )
 {
-    return ( mbedtls_ssl_tls1_3_finished_out_process( ssl ) );
+    return ( mbedtls_ssl_tls13_finished_out_process( ssl ) );
 }
 
 /*