diff --git a/lib/dirfd.c b/lib/dirfd.c
index 29761bf72..e23406353 100644
--- a/lib/dirfd.c
+++ b/lib/dirfd.c
@@ -26,5 +26,5 @@
 int
 dirfd (DIR const *dir_p)
 {
-  return DIR_TO_FD (dir_p);
+  return DIR_TO_FD;
 }