diff --git a/reference/forms/types/options/grouping.rst.inc b/reference/forms/types/options/grouping.rst.inc
index 4362678e339..0ebd339b2e8 100644
--- a/reference/forms/types/options/grouping.rst.inc
+++ b/reference/forms/types/options/grouping.rst.inc
@@ -1,7 +1,7 @@
 grouping
 ~~~~~~~~
 
-**type**: ``integer`` **default**: ``false``
+**type**: ``boolean`` **default**: ``false``
 
 This value is used internally as the ``NumberFormatter::GROUPING_USED``
 value when using PHP's ``NumberFormatter`` class. Its documentation is