diff --git a/libraries/AP_ServoRelayEvents/AP_ServoRelayEvents.h b/libraries/AP_ServoRelayEvents/AP_ServoRelayEvents.h
index 6b0c1201b9..1c5ef49a63 100644
--- a/libraries/AP_ServoRelayEvents/AP_ServoRelayEvents.h
+++ b/libraries/AP_ServoRelayEvents/AP_ServoRelayEvents.h
@@ -6,9 +6,7 @@
  * handle DO_SET_SERVO, DO_REPEAT_SERVO, DO_SET_RELAY and
  * DO_REPEAT_RELAY commands
  */
-
-#ifndef __AP_SERVORELAYEVENTS_H__
-#define __AP_SERVORELAYEVENTS_H__
+#pragma once
 
 #include <AP_Param/AP_Param.h>
 #include <AP_Relay/AP_Relay.h>
@@ -62,5 +60,3 @@ private:
 	// PWM for servos
 	uint16_t servo_value;
 };
-
-#endif /* AP_SERVORELAYEVENTS_H_ */