diff --git a/docs/tutorial/preliminary.rst b/docs/tutorial/preliminary.rst
index d1fc652d5..3dc58c915 100644
--- a/docs/tutorial/preliminary.rst
+++ b/docs/tutorial/preliminary.rst
@@ -133,7 +133,7 @@ If the operator sets an option value with the `string` type, like this:
 
     To sum up, we have arrived here
 
-    **Structure definition file**
+    **Structure description file**
 
     .. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_005/firefox/00-proxy.yml
        :linenos: