diff --git a/proto/ospf/topology.h b/proto/ospf/topology.h
index b35c4543..22b82138 100644
--- a/proto/ospf/topology.h
+++ b/proto/ospf/topology.h
@@ -13,8 +13,9 @@ struct top_hash_entry {  /* Index for fast mapping (type,rtrid,LSid)->vertex */
   struct top_hash_entry *next;		/* Next in hash chain */
   struct top_vertex *vertex;
   u32 lsa_id, rtr_id;
-  u16 lsa_type;
-  u16 pad;
+  u8 lsa_type;
+  u16 pad1;
+  u8 pad2;
 };
 
 struct top_graph {