$OpenBSD: patch-src_u_deep_c,v 1.1 2017/04/19 22:12:19 espie Exp $
--- src/u_deep.c.orig	Thu Apr 20 00:09:49 2017
+++ src/u_deep.c	Thu Apr 20 00:10:32 2017
@@ -20,6 +20,7 @@
 INLINE USHORT DecodeChar(void);
 INLINE USHORT DecodePosition(void);
 INLINE void update(USHORT c);
+extern void update(USHORT c);
 static void reconst(void);
 
 
