diff --git a/proto/ospf/lsack.c b/proto/ospf/lsack.c
index f79aa2ae..b7c13673 100644
--- a/proto/ospf/lsack.c
+++ b/proto/ospf/lsack.c
@@ -113,7 +113,14 @@ ospf_lsack_delay_tx(struct ospf_neighbor *n)
 	}
 	else
 	{
-          sk_send_to_agt(sk, len, ifa, NEIGHBOR_EXCHANGE);
+          if((ifa->state==OSPF_IS_DR)||(ifa->state==OSPF_IS_BACKUP))
+	  {
+            sk_send_to_agt(sk, len, ifa, NEIGHBOR_EXCHANGE);
+	  }
+	  else
+	  {
+            sk_send_to_bdr(sk, len, ifa);
+	  }
 	}
 
 	fill_ospf_pkt_hdr(n->ifa, pk, LSACK_P);
diff --git a/proto/ospf/lsupd.c b/proto/ospf/lsupd.c
index e28b6a7e..8059c369 100644
--- a/proto/ospf/lsupd.c
+++ b/proto/ospf/lsupd.c
@@ -149,7 +149,9 @@ flood_lsa(struct ospf_neighbor *n, struct ospf_lsa_header *hn,
 
       if(ifa->type==OSPF_IT_NBMA)
       {
-        sk_send_to_agt(sk ,len, ifa, NEIGHBOR_EXCHANGE);
+        if((ifa->state==OSPF_IS_BACKUP)||(ifa->state==OSPF_IS_DR))
+          sk_send_to_agt(sk ,len, ifa, NEIGHBOR_EXCHANGE);
+	else  sk_send_to_bdr(sk ,len, ifa);
       }
       else
       {
diff --git a/proto/ospf/packet.c b/proto/ospf/packet.c
index fc60a420..88234da1 100644
--- a/proto/ospf/packet.c
+++ b/proto/ospf/packet.c
@@ -192,3 +192,15 @@ sk_send_to_agt(sock *sk, u16 len, struct ospf_iface *ifa, u8 state)
     if(n->state>=state)
       sk_send_to(sk, len, n->ip, OSPF_PROTO);
 }                                                                       
+
+void
+sk_send_to_bdr(sock *sk, u16 len, struct ospf_iface *ifa)
+{
+  struct ospf_neighbor *n;
+
+  if(ipa_compare(ifa->drip,ipa_from_u32(0))!=0)
+    sk_send_to(sk, len, ifa->drip, OSPF_PROTO);
+  if(ipa_compare(ifa->bdrip,ipa_from_u32(0))!=0)
+    sk_send_to(sk, len, ifa->bdrip, OSPF_PROTO);
+}
+
diff --git a/proto/ospf/packet.h b/proto/ospf/packet.h
index 23999a23..4e132fa6 100644
--- a/proto/ospf/packet.h
+++ b/proto/ospf/packet.h
@@ -17,5 +17,6 @@ int  ospf_rx_hook(sock *sk, int size);
 void ospf_tx_hook(sock *sk);
 void ospf_err_hook(sock *sk, int err);
 void sk_send_to_agt(sock *sk, u16 len, struct ospf_iface *ifa, u8 state);
+void sk_send_to_bdr(sock *sk, u16 len, struct ospf_iface *ifa);
 
 #endif /* _BIRD_OSPF_PACKET_H_ */