diff --git a/firmware/src/keyboard_lights.cpp b/firmware/src/keyboard_lights.cpp
index d00b355..8cb24d8 100644
--- a/firmware/src/keyboard_lights.cpp
+++ b/firmware/src/keyboard_lights.cpp
@@ -2,6 +2,7 @@
 // Created by Hykilpikonna on 4/21/23.
 //
 
+#include <Arduino.h>
 #include "config.h"
 #include "Adafruit_NeoPixel.h"