diff --git a/dust3r/demo.py b/dust3r/demo.py
index c491be0..87ddc63 100644
--- a/dust3r/demo.py
+++ b/dust3r/demo.py
@@ -57,7 +57,8 @@ def print_with_timestamp(*args, **kwargs):
         now = datetime.datetime.now()
         formatted_date_time = now.strftime(time_format)
 
-        builtin_print(f'[{formatted_date_time}] ', end='')  # print with time stamp
+        common_kwargs = {k: v for k, v in kwargs.items() if k in ('file', 'flush')}
+        builtin_print(f'[{formatted_date_time}] ', end='', **common_kwargs)  # print with time stamp
         builtin_print(*args, **kwargs)
 
     builtins.print = print_with_timestamp