diff --git a/src/basic/mount-util.c b/src/basic/mount-util.c
index fc7b0b599e..ac072fa0a5 100644
--- a/src/basic/mount-util.c
+++ b/src/basic/mount-util.c
@@ -132,7 +132,7 @@ static int fd_fdinfo_mnt_id(int fd, const char *filename, int flags, int *mnt_id
         if (r == -ENOENT) /* The fdinfo directory is a relatively new addition */
                 return -EOPNOTSUPP;
         if (r < 0)
-                return -errno;
+                return r;
 
         p = startswith(fdinfo, "mnt_id:");
         if (!p) {