diff -ruNp tcp_wrappers_7.6.orig/scaffold.c tcp_wrappers_7.6/scaffold.c
--- tcp_wrappers_7.6.orig/scaffold.c	2005-03-09 18:22:04.000000000 +0100
+++ tcp_wrappers_7.6/scaffold.c	2005-03-09 18:20:47.000000000 +0100
@@ -237,10 +237,17 @@ struct request_info *request;
 
 /* ARGSUSED */
 
-void    rfc931(request)
-struct request_info *request;
+void    rfc931(rmt_sin, our_sin, dest)
+#ifdef INET6
+struct sockaddr *rmt_sin;
+struct sockaddr *our_sin;
+#else
+struct sockaddr_in *rmt_sin;
+struct sockaddr_in *our_sin;
+#endif
+char   *dest;
 {
-    strcpy(request->user, unknown);
+    strcpy(dest, unknown);
 }
 
 /* check_path - examine accessibility */
diff -ruNp tcp_wrappers_7.6.orig/tcpd.h tcp_wrappers_7.6/tcpd.h
--- tcp_wrappers_7.6.orig/tcpd.h	2005-03-09 18:22:04.000000000 +0100
+++ tcp_wrappers_7.6/tcpd.h	2005-03-09 18:21:23.000000000 +0100
@@ -83,7 +83,11 @@ extern int hosts_access(struct request_i
 extern void shell_cmd(char *);		/* execute shell command */
 extern char *percent_x(char *, int, char *, struct request_info *);
 					/* do %<char> expansion */
+#ifdef INET6
 extern void rfc931(struct sockaddr *, struct sockaddr *, char *);
+#else
+extern void rfc931(struct sockaddr_in *, struct sockaddr_in *, char *);
+#endif
 					/* client name from RFC 931 daemon */
 extern void clean_exit(struct request_info *);	/* clean up and exit */
 extern void refuse(struct request_info *);	/* clean up and exit */