diff --git a/libraries/AP_HAL_Linux/AnalogIn_IIO.cpp b/libraries/AP_HAL_Linux/AnalogIn_IIO.cpp
index 3d15c16e31..fe00f1e93c 100644
--- a/libraries/AP_HAL_Linux/AnalogIn_IIO.cpp
+++ b/libraries/AP_HAL_Linux/AnalogIn_IIO.cpp
@@ -1,7 +1,6 @@
 #include "AnalogIn_IIO.h"
 
 #include <AP_HAL/AP_HAL.h>
-#include <AP_Common/Semaphore.h>
 
 extern const AP_HAL::HAL &hal;