diff --git a/src/main.c b/src/main.c
index ca7c19c..729ad42 100644
--- a/src/main.c
+++ b/src/main.c
@@ -124,7 +124,6 @@ static void bias_init(int in_pin, int out_pin)
 
 	pio_gpio_init(pio1, out_pin);
 
-	pio1->input_sync_bypass = 1u << in_pin;
 	gpio_set_input_hysteresis_enabled(in_pin, false);
 	gpio_set_drive_strength(out_pin, GPIO_DRIVE_STRENGTH_2MA);
 	gpio_set_slew_rate(out_pin, GPIO_SLEW_RATE_SLOW);