diff --git a/gui.c b/gui.c
index ba84fa7..7404752 100644
--- a/gui.c
+++ b/gui.c
@@ -155,26 +155,26 @@ int gui_main(Engine *engine)
                 case ' ':
                     active = !active;
                     if (active) {
-                        engine_start(client);
+                        engine_start(g_engine);
                     } else {
-                        engine_stop(client);
+                        engine_stop(g_engine);
                     }
                     break;
                 case KEY_UP:
                     bpm = fminf(bpm + 5.0f, 300.0f);
-                    engine_set_bpm(client, bpm);
+                    engine_set_bpm(g_engine, bpm);
                     break;
                 case KEY_DOWN:
                     bpm = fmaxf(bpm - 5.0f, 20.0f);
-                    engine_set_bpm(client, bpm);
+                    engine_set_bpm(g_engine, bpm);
                     break;
                 case KEY_LEFT:
                     loop_length = (loop_length > 1) ? loop_length - 1 : 1;
-                    engine_set_loop_length(client, loop_length);
+                    engine_set_loop_length(g_engine, loop_length);
                     break;
                 case KEY_RIGHT:
                     loop_length = (loop_length < 64) ? loop_length + 1 : 64;
-                    engine_set_loop_length(client, loop_length);
+                    engine_set_loop_length(g_engine, loop_length);
                     break;
                 default:
                     break;