diff --git a/src/uas/FileManager.h b/src/uas/FileManager.h
index 5c95a98080e556c5147e159351df330b0b5fb480..d9bab30abb5552e82b52f424786ef1e1e6ae97b8 100644
--- a/src/uas/FileManager.h
+++ b/src/uas/FileManager.h
@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2018 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -8,8 +8,7 @@
  ****************************************************************************/
 
 
-#ifndef FILEMANAGER_H
-#define FILEMANAGER_H
+#pragma once
 
 #include <QObject>
 #include <QDir>
@@ -248,4 +247,3 @@ private:
     friend class MockLinkFileServer;
 };
 
-#endif // FileManager_H
diff --git a/src/uas/UAS.h b/src/uas/UAS.h
index 5cba2f0b8f5bf7e267d9cd99c00b2ee410591687..33161c24072431fca47cbb9f0d93c2a37192f23e 100644
--- a/src/uas/UAS.h
+++ b/src/uas/UAS.h
@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2018 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -11,8 +11,7 @@
 // UASInterface, UAS.h/cc are deprecated. All new functionality should go into Vehicle.h/cc
 //
 
-#ifndef _UAS_H_
-#define _UAS_H_
+#pragma once
 
 #include "UASInterface.h"
 #include <MAVLinkProtocol.h>
@@ -328,4 +327,3 @@ private:
 };
 
 
-#endif // _UAS_H_
diff --git a/src/uas/UASInterface.h b/src/uas/UASInterface.h
index 87fd501e9ed5c953ecabd3346fc3e61a38f603d5..f47b3355daa70a6929d44ae7e9f6eb677dd74258 100644
--- a/src/uas/UASInterface.h
+++ b/src/uas/UASInterface.h
@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2018 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -11,8 +11,7 @@
 // UASInterface, UAS.h/cc are deprecated. All new functionality should go into Vehicle.h/cc
 //
 
-#ifndef _UASINTERFACE_H_
-#define _UASINTERFACE_H_
+#pragma once
 
 #include <QObject>
 #include <QList>
@@ -192,4 +191,3 @@ signals:
 
 Q_DECLARE_INTERFACE(UASInterface, "org.qgroundcontrol/1.0")
 
-#endif // _UASINTERFACE_H_
diff --git a/src/uas/UASMessageHandler.h b/src/uas/UASMessageHandler.h
index 854a60bc2f785fc75a73466643e82c6fb29a0eb1..ae525741b072d86a04f02aec17c8ed248308821a 100644
--- a/src/uas/UASMessageHandler.h
+++ b/src/uas/UASMessageHandler.h
@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   (c) 2009-2016 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
+ *   (c) 2009-2018 QGROUNDCONTROL PROJECT <http://www.qgroundcontrol.org>
  *
  * QGroundControl is licensed according to the terms in the file
  * COPYING.md in the root of the source code directory.
@@ -14,8 +14,7 @@
  *   @author Gus Grubba <mavlink@grubba.com>
  */
 
-#ifndef QGCMESSAGEHANDLER_H
-#define QGCMESSAGEHANDLER_H
+#pragma once
 
 #include <QObject>
 #include <QVector>
@@ -158,4 +157,3 @@ private:
     MultiVehicleManager*    _multiVehicleManager;
 };
 
-#endif // QGCMESSAGEHANDLER_H