diff --git a/core/modules/book/book.views.inc b/core/modules/book/book.views.inc
index 63dfb38aec386f789651009013373ae71580f92e..9e10ccb2e834874aca7b98cb08ba184f4f59d089 100644
--- a/core/modules/book/book.views.inc
+++ b/core/modules/book/book.views.inc
@@ -84,7 +84,7 @@ function book_views_data() {
 
   $data['book']['depth'] = [
     'title' => t('Depth'),
-    'help' => t('The depth of the book page in the hierarchy; top level books have a depth of 1.'),
+    'help' => t('The depth of the book page in the hierarchy; top level book pages have a depth of 1.'),
     'field' => [
       'id' => 'numeric',
     ],