diff --git a/src/vnet/adj/adj_midchain.c b/src/vnet/adj/adj_midchain.c
index dfe52c3..542b5a1 100644
--- a/src/vnet/adj/adj_midchain.c
+++ b/src/vnet/adj/adj_midchain.c
@@ -515,6 +515,7 @@
      */
     ASSERT((adj->lookup_next_index == IP_LOOKUP_NEXT_ARP) ||
            (adj->lookup_next_index == IP_LOOKUP_NEXT_GLEAN) ||
+           (adj->lookup_next_index == IP_LOOKUP_NEXT_MCAST) ||
            (adj->lookup_next_index == IP_LOOKUP_NEXT_BCAST));
 
     adj_midchain_setup(adj_index, fixup, fixup_data, flags);