diff --git a/reference/constraints/_groups-option.rst.inc b/reference/constraints/_groups-option.rst.inc
index 25ccf6e5d57..26b1d79682f 100644
--- a/reference/constraints/_groups-option.rst.inc
+++ b/reference/constraints/_groups-option.rst.inc
@@ -1,7 +1,7 @@
 ``groups``
 ~~~~~~~~~~
 
-**type**: ``array`` | ``string``
+**type**: ``array``, ``string`` or ``BackedEnum``
 
 It defines the validation group or groups of this constraint. Read more
 about :doc:`validation groups </validation/groups>`.