diff --git a/zebra/rib.h b/zebra/rib.h
index 75d7ae1b67..957f38602a 100644
--- a/zebra/rib.h
+++ b/zebra/rib.h
@@ -401,7 +401,7 @@ extern void rib_delete(afi_t afi, safi_t safi, vrf_id_t vrf_id, int type,
 		       bool fromkernel);
 
 extern struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id,
-				     union g_addr *addr,
+				     const union g_addr *addr,
 				     struct route_node **rn_out);
 extern struct route_entry *rib_match_ipv4_multicast(vrf_id_t vrf_id,
 						    struct in_addr addr,
diff --git a/zebra/zebra_rib.c b/zebra/zebra_rib.c
index 8afb5053c4..d0acf77936 100644
--- a/zebra/zebra_rib.c
+++ b/zebra/zebra_rib.c
@@ -332,7 +332,8 @@ void rib_handle_nhg_replace(struct nhg_hash_entry *old_entry,
 }
 
 struct route_entry *rib_match(afi_t afi, safi_t safi, vrf_id_t vrf_id,
-			      union g_addr *addr, struct route_node **rn_out)
+			      const union g_addr *addr,
+			      struct route_node **rn_out)
 {
 	struct prefix p;
 	struct route_table *table;