diff --git a/lib/lchown.h b/lib/lchown.h
new file mode 100644
index 00000000..25e4dac9
--- /dev/null
+++ b/lib/lchown.h
@@ -0,0 +1,9 @@
+/* Some systems don't have ENOSYS.  */
+#ifndef ENOSYS
+# ifdef ENOTSUP
+#  define ENOSYS ENOTSUP
+# else
+/* Some systems don't have ENOTSUP either.  */
+#  define ENOSYS ENOMSG
+# endif
+#endif