diff --git a/src/main.cpp b/src/main.cpp
index 930d9bf..8dbae1f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -566,6 +566,7 @@ void setup()
 
   // initialize LED digital pin as an output.
   pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, HIGH);
 
   pinMode(_VBAT, INPUT);
   analogReadResolution(12);