diff --git a/src/main.cc b/src/main.cc
index af7f62e1..cec1186c 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -967,7 +967,7 @@ int main(int argc, char* argv[])
                 auto flags = (parser.get_switch("n") ? ServerFlags::IgnoreKakrc : ServerFlags::None) |
                              (parser.get_switch("d") ? ServerFlags::Daemon : ServerFlags::None) |
                              (parser.get_switch("ro") ? ServerFlags::ReadOnly : ServerFlags::None) |
-                             (argc == 1 ? ServerFlags::StartupInfo : ServerFlags::None);
+                             (argc == 1 and isatty(0) ? ServerFlags::StartupInfo : ServerFlags::None);
                 return run_server(session, server_init, client_init, init_coord, flags, ui_type, files);
             }
             catch (convert_to_client_mode& convert)