diff --git a/Common/interface/CallbackWrapper.hpp b/Common/interface/CallbackWrapper.hpp
index f108c28b1..67703b902 100644
--- a/Common/interface/CallbackWrapper.hpp
+++ b/Common/interface/CallbackWrapper.hpp
@@ -27,6 +27,8 @@
 /// \file
 /// Defines CallbackWrapper class that wraps a callback function
 
+#pragma once
+
 #include <utility>
 
 namespace Diligent