diff --git a/Rom.py b/Rom.py
index a4c2cb04..d34b65de 100644
--- a/Rom.py
+++ b/Rom.py
@@ -1674,7 +1674,7 @@ def patch_rom(world, rom, player, team, enemized, is_mystery=False):
     from Main import __version__
     seedstring = f'{world.seed:09}' if isinstance(world.seed, int) else world.seed
     # todo: change to DR when Enemizer is okay with DR
-    rom.name = bytearray(f'ER{__version__.split("-")[0].replace(".","")[0:3]}_{team+1}_{player}_{seedstring}\0', 'utf8')[:21]
+    rom.name = bytearray(f'ER{__version__.split("-")[0].replace(".","")[0:3]}_{team+1}_{player}_{seedstring}O\0', 'utf8')[:21]
     rom.name.extend([0] * (21 - len(rom.name)))
     rom.write_bytes(0x7FC0, rom.name)