diff --git a/libraries/Filter/examples/Derivative/Derivative.cpp b/libraries/Filter/examples/Derivative/Derivative.cpp
index c04040f6c5..ba6b1f6727 100644
--- a/libraries/Filter/examples/Derivative/Derivative.cpp
+++ b/libraries/Filter/examples/Derivative/Derivative.cpp
@@ -2,14 +2,7 @@
  *       Example sketch to demonstrate use of DerivativeFilter library.
  */
 
-#include <stdlib.h>
-#include <AP_Common/AP_Common.h>
-#include <AP_Progmem/AP_Progmem.h>
 #include <AP_HAL/AP_HAL.h>
-#include <AP_HAL_AVR/AP_HAL_AVR.h>
-#include <AP_Param/AP_Param.h>
-#include <StorageManager/StorageManager.h>
-#include <AP_Math/AP_Math.h>
 #include <Filter/Filter.h>
 #include <Filter/DerivativeFilter.h>
 
diff --git a/libraries/Filter/examples/Filter/Filter.cpp b/libraries/Filter/examples/Filter/Filter.cpp
index 0c8e95a006..1172e0e49f 100644
--- a/libraries/Filter/examples/Filter/Filter.cpp
+++ b/libraries/Filter/examples/Filter/Filter.cpp
@@ -3,15 +3,7 @@
  *       Code by Randy Mackay and Jason Short. DIYDrones.com
  */
 
-#include <AP_Common/AP_Common.h>
-#include <AP_Progmem/AP_Progmem.h>
 #include <AP_HAL/AP_HAL.h>
-#include <AP_HAL_AVR/AP_HAL_AVR.h>
-#include <AP_HAL_PX4/AP_HAL_PX4.h>
-#include <AP_HAL_Empty/AP_HAL_Empty.h>
-#include <AP_Param/AP_Param.h>
-#include <StorageManager/StorageManager.h>
-#include <AP_Math/AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
 #include <Filter/Filter.h>                     // Filter library
 #include <Filter/ModeFilter.h>         // ModeFilter class (inherits from Filter class)
 #include <Filter/AverageFilter.h>      // AverageFilter class (inherits from Filter class)
diff --git a/libraries/Filter/examples/LowPassFilter/LowPassFilter.cpp b/libraries/Filter/examples/LowPassFilter/LowPassFilter.cpp
index 33f4a7ed2a..53f3369c59 100644
--- a/libraries/Filter/examples/LowPassFilter/LowPassFilter.cpp
+++ b/libraries/Filter/examples/LowPassFilter/LowPassFilter.cpp
@@ -3,13 +3,7 @@
  *       Code by Randy Mackay. DIYDrones.com
  */
 
-#include <AP_Common/AP_Common.h>
-#include <AP_Progmem/AP_Progmem.h>
 #include <AP_HAL/AP_HAL.h>
-#include <AP_HAL_AVR/AP_HAL_AVR.h>
-#include <AP_Param/AP_Param.h>
-#include <StorageManager/StorageManager.h>
-#include <AP_Math/AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
 #include <Filter/Filter.h>                     // Filter library
 #include <Filter/LowPassFilter.h>      // LowPassFilter class (inherits from Filter class)
 
diff --git a/libraries/Filter/examples/LowPassFilter2p/LowPassFilter2p.cpp b/libraries/Filter/examples/LowPassFilter2p/LowPassFilter2p.cpp
index 1081bd9e76..3a2029ea72 100644
--- a/libraries/Filter/examples/LowPassFilter2p/LowPassFilter2p.cpp
+++ b/libraries/Filter/examples/LowPassFilter2p/LowPassFilter2p.cpp
@@ -3,15 +3,7 @@
  *       Code by Randy Mackay and Andrew Tridgell
  */
 
-#include <AP_Common/AP_Common.h>
-#include <AP_Progmem/AP_Progmem.h>
 #include <AP_HAL/AP_HAL.h>
-#include <AP_HAL_AVR/AP_HAL_AVR.h>
-#include <AP_HAL_PX4/AP_HAL_PX4.h>
-#include <AP_HAL_FLYMAPLE/AP_HAL_FLYMAPLE.h>
-#include <AP_Param/AP_Param.h>
-#include <StorageManager/StorageManager.h>
-#include <AP_Math/AP_Math.h>            // ArduPilot Mega Vector/Matrix math Library
 #include <Filter/Filter.h>                     // Filter library
 #include <Filter/LowPassFilter2p.h>