--- plzip-1.13-rc1/main.cc	2026-01-14 21:55:17.000000000 +0100
+++ plzip-1.13-rc1-1f/main.cc	2026-01-20 23:49:31.254445700 +0100
@@ -969,7 +969,11 @@ int main( const int argc, const char * c
   if( program_mode == m_test || to_stdout ) default_output_filename.clear();
 
   if( to_stdout && program_mode != m_test )	// check tty only once
-    { outfd = STDOUT_FILENO; if( !check_tty_out( program_mode ) ) return 1; }
+    {
+    outfd = STDOUT_FILENO;
+    if ( !force )
+      { if( !check_tty_out( program_mode ) ) return 1; }
+    }
   else outfd = -1;
 
   const bool to_file = !to_stdout && program_mode != m_test &&