diff --git a/libuavcan/include/uavcan/protocol/firmware_update_trigger.hpp b/libuavcan/include/uavcan/protocol/firmware_update_trigger.hpp
index 7003aef075..f32e1598c7 100644
--- a/libuavcan/include/uavcan/protocol/firmware_update_trigger.hpp
+++ b/libuavcan/include/uavcan/protocol/firmware_update_trigger.hpp
@@ -2,7 +2,7 @@
  * Copyright (C) 2015 Pavel Kirienko <pavel.kirienko@gmail.com>
  */
 
-#ifndef UAVCAN_PROTOCOL_FIRMWAREUPDATE_TRIGGER_HPP_INCLUDED
+#ifndef UAVCAN_PROTOCOL_FIRMWARE_UPDATE_TRIGGER_HPP_INCLUDED
 #define UAVCAN_PROTOCOL_FIRMWARE_UPDATE_TRIGGER_HPP_INCLUDED
 
 #include <uavcan/build_config.hpp>