diff --git a/libraries/AP_InertialSensor/AP_InertialSensor_SITL.cpp b/libraries/AP_InertialSensor/AP_InertialSensor_SITL.cpp
index 6cb4ff9db8..10a141193a 100644
--- a/libraries/AP_InertialSensor/AP_InertialSensor_SITL.cpp
+++ b/libraries/AP_InertialSensor/AP_InertialSensor_SITL.cpp
@@ -2,7 +2,7 @@
 #include "AP_InertialSensor_SITL.h"
 #include <AP_Logger/AP_Logger.h>
 #include <SITL/SITL.h>
-#include <stdio.h>
+#include <fcntl.h>
 
 #if AP_SIM_INS_ENABLED