diff --git a/bfps/DNS.py b/bfps/DNS.py
index b72527a85e52189f9e16104d5dac1813e65673a8..fdaa0f63d37716d66b7a18a10568db45f7d7cf37 100644
--- a/bfps/DNS.py
+++ b/bfps/DNS.py
@@ -1036,7 +1036,7 @@ class DNS(_code):
             opt = None):
         if not os.path.exists(self.get_data_file_name()):
             self.generate_initial_condition(opt = opt)
-        self.write_par()
+            self.write_par()
         self.run(
                 nb_processes = opt.nb_processes,
                 nb_threads_per_process = opt.nb_threads_per_process,