diff --git a/ietf/doc/utils.py b/ietf/doc/utils.py
index b2e65066a..6c9409475 100644
--- a/ietf/doc/utils.py
+++ b/ietf/doc/utils.py
@@ -17,7 +17,6 @@ from zoneinfo import ZoneInfo
 
 from django.conf import settings
 from django.contrib import messages
-from django.db.models import QuerySet
 from django.forms import ValidationError
 from django.http import Http404
 from django.template.loader import render_to_string
@@ -25,6 +24,7 @@ from django.utils import timezone
 from django.utils.html import escape
 from django.urls import reverse as urlreverse
 
+from django_stubs_ext import QuerySetAny
 
 import debug                            # pyflakes:ignore
 from ietf.community.models import CommunityList
@@ -345,7 +345,7 @@ def augment_events_with_revision(doc, events):
     """Take a set of events for doc and add a .rev attribute with the
     revision they refer to by checking NewRevisionDocEvents."""
 
-    if isinstance(events, QuerySet):
+    if isinstance(events, QuerySetAny):
         qs = events.filter(newrevisiondocevent__isnull=False)
     else:
         qs = NewRevisionDocEvent.objects.filter(doc=doc)
@@ -353,7 +353,7 @@ def augment_events_with_revision(doc, events):
 
     if doc.type_id == "draft" and doc.get_state_slug() == "rfc":
         # add fake "RFC" revision
-        if isinstance(events, QuerySet):
+        if isinstance(events, QuerySetAny):
             e = events.filter(type="published_rfc").order_by('time').last()
         else:
             e = doc.latest_event(type="published_rfc")