diff --git a/engine.c b/engine.c
index 8a7bd5c..15bba10 100644
--- a/engine.c
+++ b/engine.c
@@ -19,7 +19,7 @@ static int process_callback(jack_nframes_t nframes, void *arg) {
     
     void *midi_in_buf = jack_port_get_buffer(engine->midi_in_port, nframes);
     void *midi_scene_buf = jack_port_get_buffer(engine->midi_scene_in_port, nframes);
-    void *midi_clock_buf = jack_port_get_buffer(engine->midi_clock_in_port, nframes);
+    (void)jack_port_get_buffer(engine->midi_clock_in_port, nframes);
     void *midi_out_buf = jack_port_get_buffer(engine->midi_out_port, nframes);
     
     jack_midi_clear_buffer(midi_out_buf);
diff --git a/makefile b/makefile
index 068d557..a375747 100644
--- a/makefile
+++ b/makefile
@@ -1,5 +1,5 @@
 CC = gcc
-CFLAGS = -Wall -Wextra -std=c99 -D_POSIX_C_SOURCE=200809L -Ilib 
+CFLAGS = -Wall -Wextra -std=c99 -D_POSIX_C_SOURCE=200809L -I. -Ilib
 LDFLAGS = -ljack -lm -lncurses -lpthread
 
 all: jack-looper test_engine test_tui test_gui test_cli test_stress test_wav_io