diff --git a/django_select2/widgets.py b/django_select2/widgets.py
index bd7a1a3..1464a9d 100644
--- a/django_select2/widgets.py
+++ b/django_select2/widgets.py
@@ -346,6 +346,8 @@ class HeavySelect2Mixin(Select2Mixin):
 
                 3. Otherwise, check the cached results. When the user searches in the fields then all the returned
                 responses from server, which has the value and label mapping, are cached by ``heavy_data.js``.
+                
+        :type userGetValTextFuncName: :py:obj:`str`
 
         .. tip:: Since version 3.2.0, cookies or localStorage are no longer checked or used. All
             :py:class:`~.field.HeavyChoiceField` must override :py:meth:`~.fields.HeavyChoiceField.get_val_txt`.