diff --git a/libraries/AP_RCMapper/AP_RCMapper.h b/libraries/AP_RCMapper/AP_RCMapper.h
index dab038dea5..2bae2d6c63 100644
--- a/libraries/AP_RCMapper/AP_RCMapper.h
+++ b/libraries/AP_RCMapper/AP_RCMapper.h
@@ -1,6 +1,5 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-#ifndef AP_RCMAPPER_H
-#define AP_RCMAPPER_H
+#pragma once
 
 #include <inttypes.h>
 #include <AP_Common/AP_Common.h>
@@ -34,4 +33,3 @@ private:
     AP_Int8 _ch_yaw;
     AP_Int8 _ch_throttle;
 };
-#endif