diff --git a/libraries/AP_Buffer/AP_Buffer.h b/libraries/AP_Buffer/AP_Buffer.h
index 1b56247120..8f02ab116f 100644
--- a/libraries/AP_Buffer/AP_Buffer.h
+++ b/libraries/AP_Buffer/AP_Buffer.h
@@ -2,9 +2,7 @@
 
 /// @file	AP_Buffer.h
 /// @brief	fifo (queue) buffer template class
-
-#ifndef __AP_BUFFER_H__
-#define __AP_BUFFER_H__
+#pragma once
 
 #include <stdint.h>
 
@@ -153,5 +151,3 @@ T& AP_Buffer<T,SIZE>::peek_mutable(uint8_t position)
     // return desired value
     return _buff[j];
 }
-
-#endif  // __AP_BUFFER_H__