diff --git a/src/common/uint128.h b/src/common/uint128.h
index 676a5d1723..a3be2a2cba 100644
--- a/src/common/uint128.h
+++ b/src/common/uint128.h
@@ -2,6 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#pragma once
+
 #include <utility>
 #include "common/common_types.h"