diff --git a/manager/config-validator.hpp b/manager/config-validator.hpp
index 5d9ff5f..1dd6029 100644
--- a/manager/config-validator.hpp
+++ b/manager/config-validator.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "grouplayout.hpp"
 #include "ledlayout.hpp"