diff --git a/parastell/cubit_io.py b/parastell/cubit_io.py
index 477c32a4..a16307de 100644
--- a/parastell/cubit_io.py
+++ b/parastell/cubit_io.py
@@ -67,7 +67,7 @@ def export_cub5(filename, export_dir=''):
     Arguments:
         filename (str): name of cub5 output file, excluding '.cub5' extension.
         export_dir (str): directory to which to export the cub5 output file
-        (defaults to empty string).
+            (defaults to empty string).
     """
     init_cubit()