diff --git a/libraries/AP_Notify/OreoLED_I2C.cpp b/libraries/AP_Notify/OreoLED_I2C.cpp
index 57397bba6d..c50428c371 100644
--- a/libraries/AP_Notify/OreoLED_I2C.cpp
+++ b/libraries/AP_Notify/OreoLED_I2C.cpp
@@ -19,7 +19,6 @@
 
 #include <AP_HAL/AP_HAL.h>
 #include <AP_HAL/I2CDevice.h>
-#include <AP_Common/Semaphore.h>
 
 #include <AP_BoardConfig/AP_BoardConfig.h>
 #include "OreoLED_I2C.h"
diff --git a/libraries/AP_Notify/ToneAlarm.cpp b/libraries/AP_Notify/ToneAlarm.cpp
index 103cf9bcaf..2c0aae6626 100644
--- a/libraries/AP_Notify/ToneAlarm.cpp
+++ b/libraries/AP_Notify/ToneAlarm.cpp
@@ -18,7 +18,6 @@
 
 #include <AP_HAL/AP_HAL.h>
 #include <AP_Math/AP_Math.h>
-#include <AP_Common/Semaphore.h>
 
 #include "ToneAlarm.h"
 #include "AP_Notify.h"
diff --git a/libraries/AP_Notify/ToshibaLED_I2C.cpp b/libraries/AP_Notify/ToshibaLED_I2C.cpp
index 99afcb9deb..446837b406 100644
--- a/libraries/AP_Notify/ToshibaLED_I2C.cpp
+++ b/libraries/AP_Notify/ToshibaLED_I2C.cpp
@@ -23,7 +23,6 @@
 #include <utility>
 
 #include <AP_HAL/AP_HAL.h>
-#include <AP_Common/Semaphore.h>
 
 extern const AP_HAL::HAL& hal;