diff --git a/src/input_common/udp/udp.h b/src/input_common/udp/udp.h
index ea3de60bb..0e56e431b 100644
--- a/src/input_common/udp/udp.h
+++ b/src/input_common/udp/udp.h
@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#pragma once
+
 #include <memory>
 #include <unordered_map>
 #include "input_common/main.h"