diff --git a/AdjusterMain.py b/AdjusterMain.py
index c7835251..b6c128fa 100644
--- a/AdjusterMain.py
+++ b/AdjusterMain.py
@@ -19,7 +19,7 @@ def adjust(args):
     else:
         sprite = None
 
-    outfilebase = 'ER_adjusted'
+    outfilebase = os.path.basename(args.rom)[:-4] + '_adjusted'
 
     if os.stat(args.rom).st_size == 2097152 and os.path.splitext(args.rom)[-1].lower() == '.sfc':
         rom = LocalRom(args.rom, False)