diff --git a/libraries/AP_IRLock/AP_IRLock_I2C.cpp b/libraries/AP_IRLock/AP_IRLock_I2C.cpp
index ea1b312e66..eea4776b6d 100644
--- a/libraries/AP_IRLock/AP_IRLock_I2C.cpp
+++ b/libraries/AP_IRLock/AP_IRLock_I2C.cpp
@@ -23,6 +23,8 @@
 #include <AP_HAL/AP_HAL.h>
 #include "AP_IRLock_I2C.h"
 #include <stdio.h>
+#include <utility>
+#include <AP_HAL/I2CDevice.h>
 
 extern const AP_HAL::HAL& hal;