diff --git a/cocas/main.py b/cocas/main.py
index 558db0b..248557e 100755
--- a/cocas/main.py
+++ b/cocas/main.py
@@ -101,14 +101,14 @@ def main():
 
     try:
         if args.merge:
-            write_object_file('merged.obj', [tup[1] for tup in objects], target, (args.debug or args.merge))
+            write_object_file((args.output or 'merged.obj'), [tup[1] for tup in objects],
+                              target, bool(args.debug or args.merge))
         elif args.compile and args.output:
-            write_object_file(args.output, [tup[1] for tup in objects], target, args.debug)
+            write_object_file(args.output, [tup[1] for tup in objects], target, bool(args.debug))
         elif args.compile:
             for path, obj in objects:
-                write_object_file(path.with_suffix('.obj').name, [obj], target, args.debug)
+                write_object_file(path.with_suffix('.obj').name, [obj], target, bool(args.debug))
         else:
-            # data, code_locations = link(objects)
             data, code_locations = target_link(objects, target)
             if args.output:
                 write_image(args.output, data)