1 files changed, 2 insertions, 0 deletions
diff --git a/src/basic/fd-util.h b/src/basic/fd-util.h
index 5061e32196..64918a4861 100644
--- a/src/basic/fd-util.h
+++ b/src/basic/fd-util.h
@@ -117,6 +117,8 @@ static inline int dir_fd_is_root_or_cwd(int dir_fd) {
         return dir_fd == AT_FDCWD ? true : path_is_root_at(dir_fd, NULL);
 }
 
+int fds_are_same_mount(int fd1, int fd2);
+
 /* The maximum length a buffer for a /proc/self/fd/<fd> path needs */
 #define PROC_FD_PATH_MAX \
         (STRLEN("/proc/self/fd/") + DECIMAL_STR_MAX(int))