diff --git a/supabase/migrations/049_map_realtime_replica_identity.sql b/supabase/migrations/049_map_realtime_replica_identity.sql
new file mode 100644
index 0000000..56eeb65
--- /dev/null
+++ b/supabase/migrations/049_map_realtime_replica_identity.sql
@@ -0,0 +1,8 @@
+-- ============================================================
+-- Fix map realtime: set REPLICA IDENTITY FULL so Supabase
+-- Realtime can evaluate RLS policies for all subscribers
+-- ============================================================
+
+ALTER TABLE map_layers REPLICA IDENTITY FULL;
+ALTER TABLE map_pins REPLICA IDENTITY FULL;
+ALTER TABLE map_shapes REPLICA IDENTITY FULL;