diff --git a/src/utils/dirname.hpp b/src/utils/dirname.hpp
index 73e1b577200091515112c67ea4541c329bd32aa8..c13393dbfca716ea8ac409b0300b0d89fd5c9e9c 100644
--- a/src/utils/dirname.hpp
+++ b/src/utils/dirname.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include <string>
 
 namespace utils