--- src/regexp/regsub.c.orig	2006-07-24 04:03:43.000000000 +1000
+++ src/regexp/regsub.c	2012-06-11 03:08:47.000000000 +1000
@@ -59,7 +59,7 @@
 char rcsid_regsub_c[] =
     "$Id: regsub.c,v 1.7 2006/07/23 16:15:55 tsjensen Exp $";
 
-
+void   regerror    (char *msg);
 
 #ifndef CHARBITS
 #define UCHARAT(p)      ((int)*(unsigned char *)(p))
--- src/regexp/regexp.c.orig	2006-07-24 04:03:43.000000000 +1000
+++ src/regexp/regexp.c	2012-06-11 03:07:47.000000000 +1000
@@ -134,6 +134,8 @@
 #define	UCHARAT(p)	((int)*(p)&CHARBITS)
 #endif
 
+void   regerror    (char *msg);
+
 #define	FAIL(m)	{ regerror(m); return(NULL); }
 #define	ISMULT(c)	((c) == '*' || (c) == '+' || (c) == '?')
 #define	META	"^$.[()|?+*\\"