diff --git a/org/qmckl_electron.org b/org/qmckl_electron.org
index 67474b0..fc74aa9 100644
--- a/org/qmckl_electron.org
+++ b/org/qmckl_electron.org
@@ -1152,7 +1152,7 @@ assert(fabs(en_distance[1][0][1] - 3.1804527583077356) < 1.e-12);
 }
   #+end_src
 
-**✸ Compute file names
+*** Compute file names
     #+begin_src emacs-lisp
 ; The following is required to compute the file names