diff --git a/libraries/AP_OSD/AP_OSD_SITL.cpp b/libraries/AP_OSD/AP_OSD_SITL.cpp
index 16cd160b63..fd03fe754c 100644
--- a/libraries/AP_OSD/AP_OSD_SITL.cpp
+++ b/libraries/AP_OSD/AP_OSD_SITL.cpp
@@ -23,7 +23,6 @@
 #ifdef WITH_SITL_OSD
 
 #include "AP_OSD_SITL.h"
-#include <AP_Common/Semaphore.h>
 #include <AP_HAL/Util.h>
 #include <AP_HAL/Semaphores.h>
 #include <AP_HAL/Scheduler.h>