diff --git a/ospfd/ospf_lsa.h b/ospfd/ospf_lsa.h
index c5541c8..021d6a4 100644
--- a/ospfd/ospf_lsa.h
+++ b/ospfd/ospf_lsa.h
@@ -80,6 +80,7 @@
 #ifdef HAVE_NSSA
 #define OSPF_LSA_LOCAL_XLT	  0x20
 #endif /* HAVE_NSSA */
+#define OSPF_LSA_PREMATURE_AGE	  0x40
 
   /* LSA data. */
   struct lsa_header *data;