diff --git a/src/libfetchers/include/nix/fetchers/git-lfs-fetch.hh b/src/libfetchers/include/nix/fetchers/git-lfs-fetch.hh
index e701288cf..b59da391a 100644
--- a/src/libfetchers/include/nix/fetchers/git-lfs-fetch.hh
+++ b/src/libfetchers/include/nix/fetchers/git-lfs-fetch.hh
@@ -1,3 +1,6 @@
+#pragma once
+///@file
+
 #include "nix/util/canon-path.hh"
 #include "nix/util/serialise.hh"
 #include "nix/util/url.hh"