diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c
index 351fb21..ede5908 100644
--- a/ospfd/ospf_packet.c
+++ b/ospfd/ospf_packet.c
@@ -1590,7 +1590,7 @@
 
       /* Validate the LSA's LS checksum. */
       sum = lsah->checksum;
-      if (sum != ospf_lsa_checksum (lsah))
+      if (! ospf_lsa_checksum_valid (lsah))
 	{
 	  /* (bug #685) more details in a one-line message make it possible
 	   * to identify problem source on the one hand and to have a better