diff --git a/ospfd/ospf_abr.c b/ospfd/ospf_abr.c
index e23ace2..51fb2d6 100644
--- a/ospfd/ospf_abr.c
+++ b/ospfd/ospf_abr.c
@@ -565,7 +565,7 @@
   if (IS_DEBUG_OSPF_EVENT)
     zlog_info ("ospf_abr_update_aggregate(): Start");
 
-  if (range->cost_config != -1)
+  if (range->cost_config != OSPF_AREA_RANGE_COST_UNSPEC)
     {
       if (IS_DEBUG_OSPF_EVENT)
         zlog_info ("ospf_abr_update_aggregate(): use configured cost %d",