diff --git a/lib/sockunion.h b/lib/sockunion.h
index 180b2b4..1a0a3c9 100644
--- a/lib/sockunion.h
+++ b/lib/sockunion.h
@@ -78,12 +78,6 @@
 #define SET_IN6_LINKLOCAL_IFINDEX(a, i)
 #endif /* KAME */
 
-/* shortcut macro to specify address field of struct sockaddr */
-#define sock2ip(X)   (((struct sockaddr_in *)(X))->sin_addr.s_addr)
-#ifdef HAVE_IPV6
-#define sock2ip6(X)  (((struct sockaddr_in6 *)(X))->sin6_addr.s6_addr)
-#endif /* HAVE_IPV6 */
-
 #define sockunion_family(X)  (X)->sa.sa_family
 
 #define sockunion2ip(X)      (X)->sin.sin_addr.s_addr
@@ -94,7 +88,6 @@
 extern int sockunion_cmp (union sockunion *, union sockunion *);
 extern int sockunion_same (union sockunion *, union sockunion *);
 
-extern struct in_addr sockunion_get_in_addr (union sockunion *su);
 extern int sockunion_accept (int sock, union sockunion *);
 extern int sockunion_stream_socket (union sockunion *);
 extern int sockopt_reuseaddr (int);