diff --git a/libraries/AP_RangeFinder/AP_RangeFinder_MaxsonarI2CXL.cpp b/libraries/AP_RangeFinder/AP_RangeFinder_MaxsonarI2CXL.cpp
index 896fa1ec18..db30e18cdb 100644
--- a/libraries/AP_RangeFinder/AP_RangeFinder_MaxsonarI2CXL.cpp
+++ b/libraries/AP_RangeFinder/AP_RangeFinder_MaxsonarI2CXL.cpp
@@ -27,7 +27,6 @@
 
 #include <AP_HAL/AP_HAL.h>
 #include <AP_HAL/utility/sparse-endian.h>
-#include <AP_Common/Semaphore.h>
 
 extern const AP_HAL::HAL& hal;
 
diff --git a/libraries/AP_RangeFinder/AP_RangeFinder_TeraRangerI2C.cpp b/libraries/AP_RangeFinder/AP_RangeFinder_TeraRangerI2C.cpp
index 8fa72f0385..e80def8808 100644
--- a/libraries/AP_RangeFinder/AP_RangeFinder_TeraRangerI2C.cpp
+++ b/libraries/AP_RangeFinder/AP_RangeFinder_TeraRangerI2C.cpp
@@ -20,7 +20,6 @@
 #include <utility>
 #include <AP_HAL/AP_HAL.h>
 #include <AP_Math/crc.h>
-#include <AP_Common/Semaphore.h>
 
 extern const AP_HAL::HAL& hal;
 
diff --git a/libraries/AP_RangeFinder/AP_RangeFinder_VL53L1X.cpp b/libraries/AP_RangeFinder/AP_RangeFinder_VL53L1X.cpp
index fdf35d0bc3..4a54cddc30 100644
--- a/libraries/AP_RangeFinder/AP_RangeFinder_VL53L1X.cpp
+++ b/libraries/AP_RangeFinder/AP_RangeFinder_VL53L1X.cpp
@@ -25,7 +25,6 @@
 #include <AP_HAL/AP_HAL.h>
 #include <AP_HAL/utility/sparse-endian.h>
 #include <stdio.h>
-#include <AP_Common/Semaphore.h>
 
 extern const AP_HAL::HAL& hal;