diff --git a/scripts/synapse_port_db b/scripts/synapse_port_db
index a7a50e4d3..d6d8ee50c 100755
--- a/scripts/synapse_port_db
+++ b/scripts/synapse_port_db
@@ -42,6 +42,7 @@ BOOLEAN_COLUMNS = {
     "public_room_list_stream": ["visibility"],
     "device_lists_outbound_pokes": ["sent"],
     "users_who_share_rooms": ["share_private"],
+    "groups": ["is_public"],
 }