diff --git a/Rom.py b/Rom.py
index 72403c5e..220dcc2d 100644
--- a/Rom.py
+++ b/Rom.py
@@ -547,7 +547,7 @@ def patch_rom(world, rom, player, team, is_mystery=False):
     # setup dr option flags based on experimental, etc.
     dr_flags = DROptions.NoOptions
     if world.mirrorscroll[player]:
-        dr_flags = DROptions.Town_Portal
+        dr_flags |= DROptions.Town_Portal
     if world.doorShuffle[player] == 'vanilla':
         dr_flags |= DROptions.Eternal_Mini_Bosses 
     if world.doorShuffle[player] not in  ['vanilla', 'basic']: