diff --git a/filter/config.Y b/filter/config.Y
index 6af39c10..ca792593 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -285,7 +285,7 @@ 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, GW_MPLS,
+	FROM, GW, NET, MASK, PROTO, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS,
 	ROA_CHECK, ASN, SRC, DST,
 	IS_V4, IS_V6,
 	LEN, MAXLEN,
@@ -765,7 +765,6 @@ static_attr:
    GW      { $$ = f_new_static_attr(T_IP,         SA_GW,	0); }
  | NET     { $$ = f_new_static_attr(T_NET,	  SA_NET,	1); }
  | PROTO   { $$ = f_new_static_attr(T_STRING,     SA_PROTO,	1); }
- | SOURCE  { $$ = f_new_static_attr(T_ENUM_RTS,   SA_SOURCE,	1); }
  | DEST    { $$ = f_new_static_attr(T_ENUM_RTD,   SA_DEST,	0); }
  | IFNAME  { $$ = f_new_static_attr(T_STRING,     SA_IFNAME,	0); }
  | IFINDEX { $$ = f_new_static_attr(T_INT,        SA_IFINDEX,	1); }
diff --git a/filter/data.h b/filter/data.h
index 49b29499..23db4a85 100644
--- a/filter/data.h
+++ b/filter/data.h
@@ -25,7 +25,6 @@ enum f_sa_code {
   SA_GW = 1,
   SA_NET,
   SA_PROTO,
-  SA_SOURCE,
   SA_DEST,
   SA_IFNAME,
   SA_IFINDEX,
diff --git a/filter/f-inst.c b/filter/f-inst.c
index 5eacc716..23271ce7 100644
--- a/filter/f-inst.c
+++ b/filter/f-inst.c
@@ -536,7 +536,6 @@
       case SA_GW:	RESULT(sa.type, ip, rta->nh.gw); break;
       case SA_NET:	RESULT(sa.type, net, (*fs->rte)->net->n.addr); break;
       case SA_PROTO:	RESULT(sa.type, s, (*fs->rte)->src->proto->name); break;
-      case SA_SOURCE:	RESULT(sa.type, i, rta->source); break;
       case SA_DEST:	RESULT(sa.type, i, rta->dest); break;
       case SA_IFNAME:	RESULT(sa.type, s, rta->nh.iface ? rta->nh.iface->name : ""); break;
       case SA_IFINDEX:	RESULT(sa.type, i, rta->nh.iface ? rta->nh.iface->index : 0); break;
diff --git a/lib/route.h b/lib/route.h
index 40ba150d..8fdb5d8b 100644
--- a/lib/route.h
+++ b/lib/route.h
@@ -85,7 +85,6 @@ typedef struct rta {
   struct ea_list *eattrs;		/* Extended Attribute chain */
   struct hostentry *hostentry;		/* Hostentry for recursive next-hops */
   u16 cached:1;				/* Are attributes cached? */
-  u16 source:7;				/* Route source (RTS_...) */
   u16 dest:4;				/* Route destination type (RTD_...) */
   struct nexthop nh;			/* Next hop */
 } rta;
@@ -131,12 +130,13 @@ static inline int rte_is_reachable(rte *r)
 typedef struct eattr {
   word id;				/* EA_CODE(PROTOCOL_..., protocol-dependent ID) */
   byte flags;				/* Protocol-dependent flags */
-  byte type:5;				/* Attribute type */
+  byte type;				/* Attribute type */
+  byte rfu:5;
   byte originated:1;			/* The attribute has originated locally */
   byte fresh:1;				/* An uncached attribute (e.g. modified in export filter) */
   byte undef:1;				/* Explicitly undefined */
 
-  PADDING(unused, 0, 4);
+  PADDING(unused, 3, 3);
 
   union bval u;
 } eattr;
@@ -308,6 +308,12 @@ u32 rt_get_igp_metric(rte *rt);
 /* From: Advertising router */
 extern struct ea_class ea_gen_from;
 
+/* Source: An old method to devise the route source protocol and kind.
+ * To be superseded in a near future by something more informative. */
+extern struct ea_class ea_gen_source;
+static inline u32 rt_get_source_attr(rte *rt)
+{ return ea_get_int(rt->attrs->eattrs, &ea_gen_source, 0); }
+
 /* Next hop structures */
 
 #define NEXTHOP_MAX_SIZE (sizeof(struct nexthop) + sizeof(u32)*MPLS_MAX_LABEL_STACK)
diff --git a/lib/type_test.c b/lib/type_test.c
index 20e7630b..b526db69 100644
--- a/lib/type_test.c
+++ b/lib/type_test.c
@@ -54,6 +54,7 @@ t_eattr(void)
   e.id = ~0;
   e.flags = ~0;
   e.type = ~0;
+  e.rfu = ~0;
   e.originated = ~0;
   e.fresh = ~0;
   e.undef = ~0;
diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index a892bfd5..39fd7db4 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -92,6 +92,22 @@ const char * const rta_src_names[RTS_MAX] = {
   [RTS_RPKI]		= "RPKI",
 };
 
+static void
+ea_gen_source_format(const eattr *a, byte *buf, uint size)
+{
+  if ((a->u.data >= RTS_MAX) || !rta_src_names[a->u.data])
+    bsnprintf(buf, size, "unknown");
+  else
+    bsnprintf(buf, size, "%s", rta_src_names[a->u.data]);
+}
+
+struct ea_class ea_gen_source = {
+  .name = "source",
+  .type = T_ENUM_RTS,
+  .readonly = 1,
+  .format = ea_gen_source_format,
+};
+
 const char * rta_dest_names[RTD_MAX] = {
   [RTD_NONE]		= "",
   [RTD_UNICAST]		= "unicast",
@@ -1234,7 +1250,6 @@ rta_hash(rta *a)
 #define MIX(f) mem_hash_mix(&h, &(a->f), sizeof(a->f));
 #define BMIX(f) mem_hash_mix_num(&h, a->f);
   MIX(hostentry);
-  BMIX(source);
   BMIX(dest);
 #undef MIX
 
@@ -1244,8 +1259,7 @@ rta_hash(rta *a)
 static inline int
 rta_same(rta *x, rta *y)
 {
-  return (x->source == y->source &&
-	  x->dest == y->dest &&
+  return (x->dest == y->dest &&
 	  x->hostentry == y->hostentry &&
 	  nexthop_same(&(x->nh), &(y->nh)) &&
 	  ea_same(x->eattrs, y->eattrs));
@@ -1388,15 +1402,10 @@ rta_do_cow(rta *o, linpool *lp)
 void
 rta_dump(rta *a)
 {
-  static char *rts[] = { "", "RTS_STATIC", "RTS_INHERIT", "RTS_DEVICE",
-			 "RTS_STAT_DEV", "RTS_REDIR", "RTS_RIP",
-			 "RTS_OSPF", "RTS_OSPF_IA", "RTS_OSPF_EXT1",
-			 "RTS_OSPF_EXT2", "RTS_BGP", "RTS_PIPE", "RTS_BABEL" };
   static char *rtd[] = { "", " DEV", " HOLE", " UNREACH", " PROHIBIT" };
 
-  debug("uc=%d %s %s h=%04x",
-	a->uc, rts[a->source],
-	rtd[a->dest], a->hash_key);
+  debug("uc=%d %s h=%04x",
+	a->uc, rtd[a->dest], a->hash_key);
   if (!a->cached)
     debug(" !CACHED");
   if (a->dest == RTD_UNICAST)
@@ -1441,8 +1450,6 @@ rta_dump_all(void)
 void
 rta_show(struct cli *c, rta *a)
 {
-  cli_printf(c, -1008, "\tType: %s", rta_src_names[a->source]);
-
   for(ea_list *eal = a->eattrs; eal; eal=eal->next)
     for(int i=0; i<eal->count; i++)
       ea_show(c, &eal->attrs[i]);
@@ -1476,6 +1483,7 @@ rta_init(void)
   ea_register_init(&ea_gen_preference);
   ea_register_init(&ea_gen_igp_metric);
   ea_register_init(&ea_gen_from);
+  ea_register_init(&ea_gen_source);
 }
 
 /*
diff --git a/nest/rt-dev.c b/nest/rt-dev.c
index ffd5afd5..af6506f6 100644
--- a/nest/rt-dev.c
+++ b/nest/rt-dev.c
@@ -83,12 +83,12 @@ dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
       struct rte_src *src = rt_get_source(P, ad->iface->index);
 
       rta a0 = {
-	.source = RTS_DEVICE,
 	.dest = RTD_UNICAST,
 	.nh.iface = ad->iface,
       };
 
       ea_set_attr_u32(&a0.eattrs, &ea_gen_preference, 0, c->preference);
+      ea_set_attr_u32(&a0.eattrs, &ea_gen_source, 0, RTS_DEVICE);
 
       a = rta_lookup(&a0);
       e = rte_get_temp(a, src);
diff --git a/nest/rt-table.c b/nest/rt-table.c
index e8b04e0b..4f119ac0 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -2588,7 +2588,7 @@ rt_flowspec_check(rtable *tab_ip, rtable *tab_flow, const net_addr *n, rta *a, i
   trie_add_prefix(tab_flow->flowspec_trie, &dst, (nb ? nb->n.addr->pxlen : 0), max_pxlen);
 
   /* No best-match BGP route -> no flowspec */
-  if (!rb || (rb->attrs->source != RTS_BGP))
+  if (!rb || (rt_get_source_attr(rb) != RTS_BGP))
     return 0;
 
   /* Find ORIGINATOR_ID values */
@@ -2620,7 +2620,7 @@ rt_flowspec_check(rtable *tab_ip, rtable *tab_flow, const net_addr *n, rta *a, i
       continue;
 
     rte *rc = nc->routes;
-    if (rc->attrs->source != RTS_BGP)
+    if (rt_get_source_attr(rc) != RTS_BGP)
       return 0;
 
     if (rta_get_first_asn(rc->attrs) != asn_b)
@@ -2637,7 +2637,7 @@ static rte *
 rt_flowspec_update_rte(rtable *tab, rte *r)
 {
 #ifdef CONFIG_BGP
-  if (r->attrs->source != RTS_BGP)
+  if (rt_get_source_attr(r) != RTS_BGP)
     return NULL;
 
   struct bgp_channel *bc = (struct bgp_channel *) r->sender;
@@ -3471,7 +3471,7 @@ rt_get_igp_metric(rte *rt)
   if (ea)
     return ea->u.data;
 
-  if (rt->attrs->source == RTS_DEVICE)
+  if (rt_get_source_attr(rt) == RTS_DEVICE)
     return 0;
 
   if (rt->src->proto->rte_igp_metric)
diff --git a/proto/babel/babel.c b/proto/babel/babel.c
index cd221c7b..a7dcee09 100644
--- a/proto/babel/babel.c
+++ b/proto/babel/babel.c
@@ -645,12 +645,13 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
   {
     struct {
       ea_list l;
-      eattr a[5];
+      eattr a[6];
     } eattrs = {
       .l.count = ARRAY_SIZE(eattrs.a),
       .a = {
 	EA_LITERAL_EMBEDDED(&ea_gen_preference, 0, c->preference),
 	EA_LITERAL_STORE_ADATA(&ea_gen_from, 0, &r->neigh->addr, sizeof(r->neigh->addr)),
+	EA_LITERAL_EMBEDDED(&ea_gen_source, 0, RTS_BABEL),
 	EA_LITERAL_EMBEDDED(&ea_babel_metric, 0, r->metric),
 	EA_LITERAL_STORE_ADATA(&ea_babel_router_id, 0, &r->router_id, sizeof(r->router_id)),
 	EA_LITERAL_EMBEDDED(&ea_babel_seqno, 0, r->seqno),
@@ -658,7 +659,6 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
     };
 
     rta a0 = {
-      .source = RTS_BABEL,
       .dest = RTD_UNICAST,
       .nh.gw = r->next_hop,
       .nh.iface = r->neigh->ifa->iface,
@@ -683,11 +683,11 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
   {
     /* Unreachable */
     rta a0 = {
-      .source = RTS_BABEL,
       .dest = RTD_UNREACHABLE,
     };
 
     ea_set_attr_u32(&a0.eattrs, &ea_gen_preference, 0, 1);
+    ea_set_attr_u32(&a0.eattrs, &ea_gen_source, 0, RTS_BABEL);
 
     rta *a = rta_lookup(&a0);
     rte *rte = rte_get_temp(a, p->p.main_source);
diff --git a/proto/bgp/attrs.c b/proto/bgp/attrs.c
index 097ba9a2..1efc26ce 100644
--- a/proto/bgp/attrs.c
+++ b/proto/bgp/attrs.c
@@ -402,7 +402,7 @@ bgp_total_aigp_metric_(rte *e, u64 *metric, const struct adata **ad)
 static inline int
 bgp_init_aigp_metric(rte *e, u64 *metric, const struct adata **ad)
 {
-  if (e->attrs->source == RTS_BGP)
+  if (rt_get_source_attr(e) == RTS_BGP)
     return 0;
 
   *metric = rt_get_igp_metric(e);
diff --git a/proto/bgp/config.Y b/proto/bgp/config.Y
index b4d8b83f..24f3ec8f 100644
--- a/proto/bgp/config.Y
+++ b/proto/bgp/config.Y
@@ -43,7 +43,7 @@ CF_KEYWORDS(CEASE, PREFIX, LIMIT, HIT, ADMINISTRATIVE, SHUTDOWN, RESET, PEER,
 
 CF_GRAMMAR
 
-toksym: BGP_MED | BGP_LOCAL_PREF ;
+toksym: BGP_MED | BGP_LOCAL_PREF | SOURCE ;
 
 proto: bgp_proto '}'  ;
 
diff --git a/proto/bgp/packets.c b/proto/bgp/packets.c
index 62d60e9a..0aa4dc40 100644
--- a/proto/bgp/packets.c
+++ b/proto/bgp/packets.c
@@ -2474,11 +2474,11 @@ bgp_decode_nlri(struct bgp_parse_state *s, u32 afi, byte *nlri, uint len, ea_lis
   {
     a = allocz(RTA_MAX_SIZE);
 
-    a->source = RTS_BGP;
     a->eattrs = ea;
 
     ea_set_attr_data(&a->eattrs, &ea_gen_from, 0, &s->proto->remote_ip, sizeof(ip_addr));
     ea_set_attr_u32(&a->eattrs, &ea_gen_preference, 0, c->c.preference);
+    ea_set_attr_u32(&a->eattrs, &ea_gen_source, 0, RTS_BGP);
 
     c->desc->decode_next_hop(s, nh, nh_len, a);
     bgp_finish_attrs(s, a);
diff --git a/proto/ospf/ospf.c b/proto/ospf/ospf.c
index 427c2c86..731adaa5 100644
--- a/proto/ospf/ospf.c
+++ b/proto/ospf/ospf.c
@@ -392,15 +392,18 @@ ospf_rte_better(struct rte *new, struct rte *old)
   if (new_metric1 == LSINFINITY)
     return 0;
 
-  if(new->attrs->source < old->attrs->source) return 1;
-  if(new->attrs->source > old->attrs->source) return 0;
+  u32 ns = rt_get_source_attr(new);
+  u32 os = rt_get_source_attr(old);
 
-  if(new->attrs->source == RTS_OSPF_EXT2)
+  if (ns < os) return 1;
+  if (ns > os) return 0;
+
+  if (ns == RTS_OSPF_EXT2)
   {
     u32 old_metric2 = ea_get_int(old->attrs->eattrs, &ea_ospf_metric2, LSINFINITY);
     u32 new_metric2 = ea_get_int(new->attrs->eattrs, &ea_ospf_metric2, LSINFINITY);
-    if(new_metric2 < old_metric2) return 1;
-    if(new_metric2 > old_metric2) return 0;
+    if (new_metric2 < old_metric2) return 1;
+    if (new_metric2 > old_metric2) return 0;
   }
 
   u32 old_metric1 = ea_get_int(old->attrs->eattrs, &ea_ospf_metric1, LSINFINITY);
@@ -413,7 +416,7 @@ ospf_rte_better(struct rte *new, struct rte *old)
 static u32
 ospf_rte_igp_metric(struct rte *rt)
 {
-  if (rt->attrs->source == RTS_OSPF_EXT2)
+  if (rt_get_source_attr(rt) == RTS_OSPF_EXT2)
     return IGP_METRIC_UNKNOWN;
 
   return ea_get_int(rt->attrs->eattrs, &ea_ospf_metric1, LSINFINITY);
@@ -571,7 +574,8 @@ ospf_get_route_info(rte * rte, byte * buf)
 {
   char *type = "<bug>";
 
-  switch (rte->attrs->source)
+  uint source = rt_get_source_attr(rte);
+  switch (source)
   {
   case RTS_OSPF:
     type = "I";
@@ -589,10 +593,10 @@ ospf_get_route_info(rte * rte, byte * buf)
 
   buf += bsprintf(buf, " %s", type);
   buf += bsprintf(buf, " (%d/%d", rt_get_preference(rte), ea_get_int(rte->attrs->eattrs, &ea_ospf_metric1, LSINFINITY));
-  if (rte->attrs->source == RTS_OSPF_EXT2)
+  if (source == RTS_OSPF_EXT2)
     buf += bsprintf(buf, "/%d", ea_get_int(rte->attrs->eattrs, &ea_ospf_metric2, LSINFINITY));
   buf += bsprintf(buf, ")");
-  if (rte->attrs->source == RTS_OSPF_EXT1 || rte->attrs->source == RTS_OSPF_EXT2)
+  if (source == RTS_OSPF_EXT1 || source == RTS_OSPF_EXT2)
   {
     eattr *ea = ea_find(rte->attrs->eattrs, &ea_ospf_tag);
     if (ea && (ea->u.data > 0))
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index ddc5b162..91739056 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -2004,11 +2004,19 @@ static inline int
 ort_changed(ort *nf, rta *nr)
 {
   rta *or = nf->old_rta;
-  return !or ||
+
+  if (!or ||
     (nf->n.metric1 != nf->old_metric1) || (nf->n.metric2 != nf->old_metric2) ||
     (nf->n.tag != nf->old_tag) || (nf->n.rid != nf->old_rid) ||
-    (nr->source != or->source) || (nr->dest != or->dest) ||
-    !nexthop_same(&(nr->nh), &(or->nh));
+    (nr->dest != or->dest) ||
+    !nexthop_same(&(nr->nh), &(or->nh)))
+    return 1;
+
+  if (	ea_get_int(nr->eattrs, &ea_gen_source, 0)
+     != ea_get_int(or->eattrs, &ea_gen_source, 0))
+    return 1;
+
+  return 0;
 }
 
 static void
@@ -2053,7 +2061,6 @@ again1:
     if (nf->n.type) /* Add the route */
     {
       rta a0 = {
-	.source = nf->n.type,
 	.dest = RTD_UNICAST,
 	.nh = *(nf->n.nhs),
       };
@@ -2067,7 +2074,7 @@ again1:
 
 	struct {
 	  ea_list l;
-	  eattr a[5];
+	  eattr a[6];
 	} eattrs;
 
 	eattrs.l = (ea_list) {};
@@ -2075,6 +2082,9 @@ again1:
 	eattrs.a[eattrs.l.count++] =
 	  EA_LITERAL_EMBEDDED(&ea_gen_preference, 0, p->p.main_channel->preference);
 
+	eattrs.a[eattrs.l.count++] = 
+	  EA_LITERAL_EMBEDDED(&ea_gen_source, 0, nf->n.type);
+
 	eattrs.a[eattrs.l.count++] =
 	  EA_LITERAL_EMBEDDED(&ea_ospf_metric1, 0, nf->n.metric1);
 
@@ -2089,6 +2099,7 @@ again1:
 	eattrs.a[eattrs.l.count++] =
 	  EA_LITERAL_EMBEDDED(&ea_ospf_router_id, 0, nf->n.rid);
 
+	ASSERT_DIE(ARRAY_SIZE(eattrs.a) >= eattrs.l.count);
 	a0.eattrs = &eattrs.l;
 
 	rta *a = rta_lookup(&a0);
diff --git a/proto/perf/perf.c b/proto/perf/perf.c
index 47a2867d..4329556c 100644
--- a/proto/perf/perf.c
+++ b/proto/perf/perf.c
@@ -143,7 +143,6 @@ perf_loop(void *data)
 
     if (!p->attrs_per_rte || !(i % p->attrs_per_rte)) {
       struct rta a0 = {
-	.source = RTS_PERF,
 	.dest = RTD_UNICAST,
 	.nh.iface = p->ifa->iface,
 	.nh.gw = gw,
@@ -151,6 +150,7 @@ perf_loop(void *data)
       };
 
       ea_set_attr_u32(&a0.eattrs, &ea_gen_preference, 0, p->p.main_channel->preference);
+      ea_set_attr_u32(&a0.eattrs, &ea_gen_source, 0, RTS_PERF);
 
       p->data[i].a = rta_lookup(&a0);
     }
diff --git a/proto/rip/rip.c b/proto/rip/rip.c
index f5442606..f7f34c27 100644
--- a/proto/rip/rip.c
+++ b/proto/rip/rip.c
@@ -152,17 +152,17 @@ rip_announce_rte(struct rip_proto *p, struct rip_entry *en)
   {
     /* Update */
     rta a0 = {
-      .source = RTS_RIP,
       .dest = RTD_UNICAST,
     };
 
     struct {
       ea_list l;
-      eattr a[2];
+      eattr a[3];
     } ea_block = {
       .l.count = ARRAY_SIZE(ea_block.a),
       .a = {
 	EA_LITERAL_EMBEDDED(&ea_gen_preference, 0, p->p.main_channel->preference),
+	EA_LITERAL_EMBEDDED(&ea_gen_source, 0, RTS_RIP),
 	EA_LITERAL_EMBEDDED(&ea_rip_metric, 0, rt->metric),
       },
     };
diff --git a/proto/rpki/rpki.c b/proto/rpki/rpki.c
index af963f49..56d8add2 100644
--- a/proto/rpki/rpki.c
+++ b/proto/rpki/rpki.c
@@ -121,11 +121,11 @@ rpki_table_add_roa(struct rpki_cache *cache, struct channel *channel, const net_
   struct rpki_proto *p = cache->p;
 
   rta a0 = {
-    .source = RTS_RPKI,
     .dest = RTD_NONE,
   };
 
   ea_set_attr_u32(&a0.eattrs, &ea_gen_preference, 0, channel->preference);
+  ea_set_attr_u32(&a0.eattrs, &ea_gen_source, 0, RTS_RPKI);
 
   rta *a = rta_lookup(&a0);
   rte *e = rte_get_temp(a, p->p.main_source);
diff --git a/proto/static/static.c b/proto/static/static.c
index ff833b16..1400e985 100644
--- a/proto/static/static.c
+++ b/proto/static/static.c
@@ -55,9 +55,9 @@ static_announce_rte(struct static_proto *p, struct static_route *r)
 {
   rta *a = allocz(RTA_MAX_SIZE);
   struct rte_src *src = static_get_source(p, r->index);
-  a->source = RTS_STATIC;
   a->dest = r->dest;
   ea_set_attr_u32(&a->eattrs, &ea_gen_preference, 0, p->p.main_channel->preference);
+  ea_set_attr_u32(&a->eattrs, &ea_gen_source, 0, RTS_STATIC);
 
   if (r->dest == RTD_UNICAST)
   {
diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
index bc6b1839..61ac7a5c 100644
--- a/sysdep/bsd/krt-sock.c
+++ b/sysdep/bsd/krt-sock.c
@@ -520,9 +520,10 @@ krt_read_route(struct ks_msg *msg, struct krt_proto *p, int scan)
 
   rta a = {
     .src = p->p.main_source,
-    .source = RTS_INHERIT,
   };
 
+  ea_set_attr_u32(&a->eattrs, &ea_gen_source, 0, RTS_INHERIT);
+
   /* reject/blackhole routes have also set RTF_GATEWAY,
      we wil check them first. */
 
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index c506c71c..e0219ce0 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -1854,7 +1854,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
     nl_announce_route(s);
 
   rta *ra = lp_allocz(s->pool, RTA_MAX_SIZE);
-  ra->source = RTS_INHERIT;
+  ea_set_attr_u32(&ra->eattrs, &ea_gen_source, 0, RTS_INHERIT);
 
   if (a[RTA_FLOW])
     s->rta_flow = rta_get_u32(a[RTA_FLOW]);