diff --git a/src/libutil-tests/meson.build b/src/libutil-tests/meson.build
index 8f9c18eed..f2552550d 100644
--- a/src/libutil-tests/meson.build
+++ b/src/libutil-tests/meson.build
@@ -59,6 +59,7 @@ sources = files(
   'json-utils.cc',
   'logging.cc',
   'lru-cache.cc',
+  'monitorfdhup.cc',
   'nix_api_util.cc',
   'pool.cc',
   'position.cc',
diff --git a/src/libutil-tests/monitorfdhup.cc b/src/libutil-tests/monitorfdhup.cc
index 01ecb92d9..f9da4022d 100644
--- a/src/libutil-tests/monitorfdhup.cc
+++ b/src/libutil-tests/monitorfdhup.cc
@@ -1,5 +1,5 @@
-#include "util.hh"
-#include "monitor-fd.hh"
+#include "nix/util/util.hh"
+#include "nix/util/monitor-fd.hh"
 
 #include <sys/file.h>
 #include <gtest/gtest.h>