diff --git a/django/contrib/auth/backends.py b/django/contrib/auth/backends.py
index f14fb3e96f78..83525306655b 100644
--- a/django/contrib/auth/backends.py
+++ b/django/contrib/auth/backends.py
@@ -99,9 +99,7 @@ def _get_user_permissions(self, user_obj):
         return user_obj.user_permissions.all()
 
     def _get_group_permissions(self, user_obj):
-        user_groups_field = get_user_model()._meta.get_field("groups")
-        user_groups_query = "group__%s" % user_groups_field.related_query_name()
-        return Permission.objects.filter(**{user_groups_query: user_obj})
+        return Permission.objects.filter(group__in=user_obj.groups.all())
 
     def _get_permissions(self, user_obj, obj, from_name):
         """