diff --git a/libraries/AP_HAL_Linux/Scheduler.cpp b/libraries/AP_HAL_Linux/Scheduler.cpp
index 9477155978..99a3db1748 100644
--- a/libraries/AP_HAL_Linux/Scheduler.cpp
+++ b/libraries/AP_HAL_Linux/Scheduler.cpp
@@ -5,7 +5,6 @@
 #include "Scheduler.h"
 #include "Storage.h"
 #include "UARTDriver.h"
-#include <unistd.h>
 #include <sys/time.h>
 #include <poll.h>
 #include <unistd.h>