diff --git a/src/Kaleidoscope-Hardware-Model01.cpp b/src/Kaleidoscope-Hardware-Model01.cpp
index 8c6e9614..4af44fcc 100644
--- a/src/Kaleidoscope-Hardware-Model01.cpp
+++ b/src/Kaleidoscope-Hardware-Model01.cpp
@@ -1,4 +1,5 @@
 #include <Kaleidoscope.h>
+#include <KeyboardioHID.h>
 #include <avr/wdt.h>
 
 KeyboardioScanner Model01::leftHand(0);