diff --git a/doc/extdev/tutorial.rst b/doc/extdev/tutorial.rst
index c011dffef..33b45035e 100644
--- a/doc/extdev/tutorial.rst
+++ b/doc/extdev/tutorial.rst
@@ -98,8 +98,9 @@ in which a Sphinx project is built: this works in several phases.
 
    Now that the metadata and cross-reference data of all existing documents is
    known, all temporary nodes are replaced by nodes that can be converted into
-   output.  For example, links are created for object references that exist, and
-   simple literal nodes are created for those that don't.
+   output using components called tranform.  For example, links are created for
+   object references that exist, and simple literal nodes are created for those
+   that don't.
 
 **Phase 4: Writing**