--- lib/libxview/textsw/txt_filter.c.orig	1993-06-29 07:17:39.000000000 +0200
+++ lib/libxview/textsw/txt_filter.c	2003-12-30 01:31:14.000000000 +0100
@@ -55,6 +55,9 @@ static char     sccsid[] = "@(#)txt_filt
 #define	REPLY_OKAY	 0
 #define	REPLY_SEND	 1
 
+static int	talk_to_filter();
+static int	start_filter();
+
 /* performance: global cache of getdtablesize() */
 extern int      dtablesize_cache;
 
