diff --git a/doc/extdev/tutorial.rst b/doc/extdev/tutorial.rst
index e7912406a..8241e109e 100644
--- a/doc/extdev/tutorial.rst
+++ b/doc/extdev/tutorial.rst
@@ -247,6 +247,7 @@ todolist directive has neither content nor arguments that need to be handled.
 The ``todo`` directive function looks like this::
 
    from sphinx.util.compat import make_admonition
+   from sphinx.locale import _
 
    class TodoDirective(Directive):