diff --git a/programs/ssl/ssl_client2.c b/programs/ssl/ssl_client2.c
index be474d4..9426a82 100644
--- a/programs/ssl/ssl_client2.c
+++ b/programs/ssl/ssl_client2.c
@@ -2030,7 +2030,8 @@
     }
 #endif
 
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3) && \
+    defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
     if( opt.sig_algs != NULL )
         mbedtls_ssl_conf_sig_algs( &conf, sig_alg_list );
 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
diff --git a/programs/ssl/ssl_server2.c b/programs/ssl/ssl_server2.c
index 4f789d5..e3587a5 100644
--- a/programs/ssl/ssl_server2.c
+++ b/programs/ssl/ssl_server2.c
@@ -3234,7 +3234,8 @@
     }
 #endif
 
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3) && \
+    defined(MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED)
     if( opt.sig_algs != NULL )
         mbedtls_ssl_conf_sig_algs( &conf, sig_alg_list );
 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */