diff --git a/library/include/larra/utils.hpp b/library/include/larra/utils.hpp
index 507458e..5d2898b 100644
--- a/library/include/larra/utils.hpp
+++ b/library/include/larra/utils.hpp
@@ -1,3 +1,4 @@
+#pragma once
 #include <boost/pfr.hpp>
 #include <utempl/utils.hpp>