diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index 0ebad93..e75a778 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -390,7 +390,7 @@
             }
 
             MBEDTLS_SSL_DEBUG_MSG( 2,("Try get sig alg %04x",*sig_alg));
-            if( mbedtls_ssl_tls13_sig_alg_is_available_for_pk(
+            if( mbedtls_ssl_tls13_check_sig_alg_cert_key_match(
                     ssl, *sig_alg, &key_cert->cert->pk ) )
             {
                 ssl->handshake->key_cert = key_cert;