1--- a/src/audio/engine.c
 2+++ b/src/audio/engine.c
 3@@ -1250,8 +1250,10 @@ engine_realloc_port_buffers (
 4             {
 5               if (pl->setting->open_with_carla)
 6                 {
 7+#ifdef HAVE_CARLA
 8                   carla_native_plugin_update_buffer_size_and_sample_rate (
 9                     pl->carla);
10+#endif //HAVE_CARLA
11                 }
12               else if (pl->setting->descr->protocol == PROT_LV2)
13                 {