diff --git a/lib/led_tm1637.c b/lib/led_tm1637.c
index cc96e13..de1cc4a 100644
--- a/lib/led_tm1637.c
+++ b/lib/led_tm1637.c
@@ -181,8 +181,7 @@ void led_tm1637_setup(void)
 	timer_set_prescaler(TIM(LED_TM1637_TIMER), 0); // don't prescale to get most precise timing ( 1/(72E6/1/(2**16))=0.91 ms > 0.5 us )
 	timer_set_period(TIM(LED_TM1637_TIMER), 500); // set the clock frequency (emprical value until the signal starts to look bad)
 	timer_clear_flag(TIM(LED_TM1637_TIMER), TIM_SR_UIF); // clear flag
-	//timer_update_on_overflow(TIM(LED_TM1637_TIMER)); // only use counter overflow as UEV source (use overflow as start time or timeout)
-	timer_enable_irq(TIM(LED_TM1637_TIMER), TIM_DIER_UIE); // enable update interrupt for timer to wake up (no ISR used)
+	timer_update_on_overflow(TIM(LED_TM1637_TIMER)); // only use counter overflow as UEV source (use overflow as start time or timeout)
 }
 
 /** wait until clock tick (timer overflow) occurred