diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c
index 4735f99..a778a50 100644
--- a/ospfd/ospf_packet.c
+++ b/ospfd/ospf_packet.c
@@ -602,8 +602,12 @@
     ipid = (time(NULL) & 0xffff);
 #endif /* WANT_OSPF_WRITE_FRAGMENT */
 
-  /* convenience - max OSPF data per packet */
-  maxdatasize = oi->ifp->mtu - sizeof (struct ip);
+  /* convenience - max OSPF data per packet,
+   * and reliability - not more data, than our
+   * socket can accept
+   */
+  maxdatasize = MIN (oi->ifp->mtu, ospf->maxsndbuflen) -
+    sizeof (struct ip);
   
   /* Get one packet from queue. */
   op = ospf_fifo_head (oi->obuf);