diff --git a/nlsr_adl.h b/nlsr_adl.h
index ac6c066..a1f48b2 100644
--- a/nlsr_adl.h
+++ b/nlsr_adl.h
@@ -46,4 +46,5 @@
 void update_adjacent_lsdb_version_to_adl(struct name_prefix *nbr, char *version);
 void adjust_adjacent_last_lsdb_requested_to_adl(char *nbr, long int sec);
 int get_next_hop_face_from_adl(char *nbr);
+int is_neighbor(char *nbr);
 #endif