diff --git a/src/ship/map/maps.rs b/src/ship/map/maps.rs
index 6eb5be3..5d04291 100644
--- a/src/ship/map/maps.rs
+++ b/src/ship/map/maps.rs
@@ -281,10 +281,9 @@ impl Maps {
 
         Maps {
             enemy_data: map_variants.iter()
-                .map(|map_variant| {
+                .flat_map(|map_variant| {
                     enemy_data_from_map_data(map_variant, &room_mode.episode())
                 })
-                .flatten()
                 .map(|enemy| apply_rare_enemy(enemy, rare_monster_table, event))
                 .collect(),
             object_data: map_variants.iter()