diff --git a/libraries/AC_WPNav/AC_Circle.h b/libraries/AC_WPNav/AC_Circle.h
index b2b4444578..47027b9cdf 100644
--- a/libraries/AC_WPNav/AC_Circle.h
+++ b/libraries/AC_WPNav/AC_Circle.h
@@ -1,6 +1,5 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-#ifndef AC_CIRCLE_H
-#define AC_CIRCLE_H
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 #include <AP_Param/AP_Param.h>
@@ -101,4 +100,3 @@ private:
     float       _angular_vel_max;   // maximum velocity in radians/sec
     float       _angular_accel; // angular acceleration in radians/sec/sec
 };
-#endif	// AC_CIRCLE_H
diff --git a/libraries/AC_WPNav/AC_WPNav.h b/libraries/AC_WPNav/AC_WPNav.h
index 81f96e8b34..909ddc784c 100644
--- a/libraries/AC_WPNav/AC_WPNav.h
+++ b/libraries/AC_WPNav/AC_WPNav.h
@@ -1,6 +1,5 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
-#ifndef AC_WPNAV_H
-#define AC_WPNAV_H
+#pragma once
 
 #include <AP_Common/AP_Common.h>
 #include <AP_Param/AP_Param.h>
@@ -321,4 +320,3 @@ protected:
     float       _spline_vel_scaler;	    //
     float       _yaw;                   // heading according to yaw
 };
-#endif	// AC_WPNAV_H