diff --git a/scripts/run_app_perf.py b/scripts/run_app_perf.py
index 143591f..ce81974 100755
--- a/scripts/run_app_perf.py
+++ b/scripts/run_app_perf.py
@@ -236,7 +236,7 @@ async def do_experiment(loop, env, args, conds, thruput_reader):
     print()
     if not args.no_record:
         now = datetime.now()
-        bin_name = os.path.basename(args.main_bin)
+        bin_name = os.path.basename(args.bin)
         dir_name = 'app-perf.{:%Y-%m-%d.%H%M%S}.{}'.format(now, bin_name)
         if args.prefix:
             dir_prefix = '{}.{:%Y-%m-%d}'.format(args.prefix, now)