diff --git a/library/ssl_tls13_generic.c b/library/ssl_tls13_generic.c
index 202f363..7ac785e 100644
--- a/library/ssl_tls13_generic.c
+++ b/library/ssl_tls13_generic.c
@@ -935,7 +935,7 @@
     *algorithm = MBEDTLS_TLS1_3_SIG_NONE;
     for( ; *sig_alg != MBEDTLS_TLS1_3_SIG_NONE ; sig_alg++ )
     {
-        if( mbedtls_ssl_sig_alg_is_supported( ssl, *sig_alg) &&
+        if( mbedtls_ssl_tls13_sig_alg_is_supported_for_certificate( *sig_alg) &&
             mbedtls_ssl_tls13_check_sig_alg_cert_key_match(
                                                         *sig_alg, own_key ) )
         {