diff --git a/src/heartbeat.c b/src/heartbeat.c
index 9052c73720b435d85abbafb19861aad456e8db16..10fb760ead99c3612841ab012cbb90f10c75f67e 100644
--- a/src/heartbeat.c
+++ b/src/heartbeat.c
@@ -42,7 +42,7 @@ static void heartbeat_cb(void *parameter)
 
 int heartbeat_init(void)
 {
-    rt_pin_mode(PKG_HEARTBEAT_LED_PIN, PIN_MODE_INPUT_PULLUP);
+    rt_pin_mode(PKG_HEARTBEAT_LED_PIN, PIN_MODE_OUTPUT);
     rt_pin_write(PKG_HEARTBEAT_LED_PIN, ~PKG_HEARTBEAT_LED_ACTIVE_LOGIC); /* close led */
 
     heartbeat = rt_timer_create("heartbeat", heartbeat_cb,