diff --git a/lib/savedir.h b/lib/savedir.h
new file mode 100644
index 000000000..3cc2491b1
--- /dev/null
+++ b/lib/savedir.h
@@ -0,0 +1,9 @@
+#undef __P
+#if defined (__STDC__) && __STDC__
+# define __P(x) x
+#else
+# define __P(x) ()
+#endif
+
+char *
+savedir __P((const char *dir, unsigned name_size));