diff --git a/firmware/main.c b/firmware/main.c
index a407623..ec4bf7d 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -134,6 +134,7 @@ int main(void)
 	init_leds();
 	init_motor();
 	init_pwm();
+	init_sampletimer();
 	sample_pending = 0;
 	synth_init();