1 files changed, 3 insertions, 1 deletions
diff --git a/src/basic/conf-files.h b/src/basic/conf-files.h
index 744ff80c09..81ebcd46b6 100644
--- a/src/basic/conf-files.h
+++ b/src/basic/conf-files.h
@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
+#include "macro.h"
+
 enum {
         CONF_FILES_EXECUTABLE    = 1 << 0,
         CONF_FILES_REGULAR       = 1 << 1,
@@ -9,7 +11,7 @@ enum {
         CONF_FILES_FILTER_MASKED = 1 << 4,
 };
 
-int conf_files_list(char ***ret, const char *suffix, const char *root, unsigned flags, const char *dir, ...);
+int conf_files_list(char ***ret, const char *suffix, const char *root, unsigned flags, const char *dir, ...) _sentinel_;
 int conf_files_list_strv(char ***ret, const char *suffix, const char *root, unsigned flags, const char* const* dirs);
 int conf_files_list_nulstr(char ***ret, const char *suffix, const char *root, unsigned flags, const char *dirs);
 int conf_files_insert(char ***strv, const char *root, char **dirs, const char *path);