diff --git a/include/mgos_pcf857x.h b/include/mgos_pcf857x.h
index bceae50..b2cb5e2 100644
--- a/include/mgos_pcf857x.h
+++ b/include/mgos_pcf857x.h
@@ -66,7 +66,6 @@ bool mgos_pcf857x_gpio_set_button_handler(struct mgos_pcf857x *dev, int pin, enu
 
 /*
  * A utility function that takes care of blinking an LED.
- * The pin must be configured as output first.
  * Set to (0, 0) to disable.
  */
 bool mgos_pcf857x_gpio_blink(struct mgos_pcf857x *dev, int pin, int on_ms, int off_ms);
diff --git a/src/mgos_pcf857x.c b/src/mgos_pcf857x.c
index 5f5cc67..040b51f 100644
--- a/src/mgos_pcf857x.c
+++ b/src/mgos_pcf857x.c
@@ -31,6 +31,8 @@ static struct mgos_pcf857x_gpio_blink_state *mgos_pcf857x_get_or_create_blink_st
     blink_states[pin]->dev = dev;
     blink_states[pin]->pin = pin;
     blink_states[pin]->timer_id = MGOS_INVALID_TIMER_ID;
+    
+    mgos_pcf857x_gpio_setup_output(dev, pin, false);
   }
 
   return blink_states[pin];