diff --git a/user-doc/tutorials/aa-lugano-4.txt b/user-doc/tutorials/aa-lugano-4.txt
index bc343abfd39ba433d547f00e9798dcc78ae0c84d..9e728fc53fd916e09c10c5c9e394d4637acd4e7a 100644
--- a/user-doc/tutorials/aa-lugano-4.txt
+++ b/user-doc/tutorials/aa-lugano-4.txt
@@ -580,3 +580,5 @@ by reading https://arxiv.org/abs/1812.08213.
 link: @subpage lugano-4 
 
 description: Calculating error bars
+
+additional-files: lugano-4