diff --git a/doc/bird.sgml b/doc/bird.sgml
index 5d1df5bc..8bfd41e1 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -1690,6 +1690,12 @@ Common route attributes are:
 	network for routes that do not have a native protocol metric attribute
 	(like <cf/ospf_metric1/ for OSPF routes). It is used mainly by BGP to
 	compare internal distances to boundary routers (see below).
+
+	<tag><label id="rta-preferred"><m/bool/ preferred</tag>
+	The optional attribute that can be used to check if the route being 
+	processed has been selected as the best-path for the network it belongs
+	to. This attribute does not take in a value, and returns a boolean.
+
 </descrip>
 
 <p>Protocol-specific route attributes are described in the corresponding
diff --git a/filter/config.Y b/filter/config.Y
index 5cd52e40..74cf509a 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -278,7 +278,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
 	SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST, LCLIST,
 	IF, THEN, ELSE, CASE,
 	TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
-	FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT,
+	FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, PREFERRED,
 	PREFERENCE,
 	ROA_CHECK, ASN, SRC, DST,
 	IS_V4, IS_V6,
@@ -751,6 +751,7 @@ static_attr:
  | IFNAME  { $$ = f_new_static_attr(T_STRING,     SA_IFNAME,	0); }
  | IFINDEX { $$ = f_new_static_attr(T_INT,        SA_IFINDEX,	1); }
  | WEIGHT  { $$ = f_new_static_attr(T_INT,        SA_WEIGHT,	0); }
+ | PREFERRED { $$ = f_new_static_attr(T_BOOL,     SA_PREFERRED, 0); }
  ;
 
 term:
diff --git a/filter/data.h b/filter/data.h
index 61cdb43e..7e43ba72 100644
--- a/filter/data.h
+++ b/filter/data.h
@@ -100,6 +100,7 @@ enum f_sa_code {
   SA_IFNAME,
   SA_IFINDEX,
   SA_WEIGHT,
+  SA_PREFERRED,
 } PACKED;
 
 /* Static attribute definition (members of struct rta) */
diff --git a/filter/f-inst.c b/filter/f-inst.c
index 5cae31ba..d5ab13b8 100644
--- a/filter/f-inst.c
+++ b/filter/f-inst.c
@@ -519,7 +519,9 @@
     {
       STATIC_ATTR;
       ACCESS_RTE;
-      struct rta *rta = (*fs->rte)->attrs;
+      struct rte *rte = (*fs->rte);
+      struct rta *rta = rte->attrs;
+      struct network *net = rte->net;
 
       switch (sa.sa_code)
       {
@@ -533,6 +535,7 @@
       case SA_IFNAME:	RESULT(sa.f_type, s, rta->nh.iface ? rta->nh.iface->name : ""); break;
       case SA_IFINDEX:	RESULT(sa.f_type, i, rta->nh.iface ? rta->nh.iface->index : 0); break;
       case SA_WEIGHT:	RESULT(sa.f_type, i, rta->nh.weight + 1); break;
+      case SA_PREFERRED: RESULT(sa.f_type, i, (rte && net->routes) ? rte_same(rte, net->routes) : 0); break;
 
       default:
 	bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code);
@@ -617,6 +620,9 @@
         }
 	break;
 
+      case SA_PREFERRED:
+	break;
+
       default:
 	bug("Invalid static attribute access (%u/%u)", sa.f_type, sa.sa_code);
       }
diff --git a/nest/route.h b/nest/route.h
index 53cdcee8..1bc59b82 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -320,6 +320,7 @@ void *net_route(rtable *tab, const net_addr *n);
 int net_roa_check(rtable *tab, const net_addr *n, u32 asn);
 rte *rte_find(net *net, struct rte_src *src);
 rte *rte_get_temp(struct rta *);
+int rte_same(rte *x, rte *y);
 void rte_update2(struct channel *c, const net_addr *n, rte *new, struct rte_src *src);
 /* rte_update() moved to protocol.h to avoid dependency conflicts */
 int rt_examine(rtable *t, net_addr *a, struct proto *p, const struct filter *filter);
diff --git a/nest/rt-table.c b/nest/rt-table.c
index 626c2fb8..b77f5eb9 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -1065,7 +1065,7 @@ rte_free_quick(rte *e)
   sl_free(rte_slab, e);
 }
 
-static int
+int
 rte_same(rte *x, rte *y)
 {
   /* rte.flags are not checked, as they are mostly internal to rtable */