diff --git a/engine.c b/engine.c
index aa0af00..89232af 100644
--- a/engine.c
+++ b/engine.c
@@ -159,7 +159,7 @@ static int process_callback(jack_nframes_t nframes, void *arg) {
         }
         
         // Process through Carla rack
-        carla_process(&state.carla_host, ch, rack_in, rack_out, nframes);
+        carla_process(&engine->carla_host, ch, rack_in, rack_out, nframes);
         
         // Copy to output
         memcpy(audio_out[ch], rack_out, nframes * sizeof(jack_default_audio_sample_t));