diff --git a/wagtail/api/v2/serializers.py b/wagtail/api/v2/serializers.py
index 18d450f6d..56317dd97 100644
--- a/wagtail/api/v2/serializers.py
+++ b/wagtail/api/v2/serializers.py
@@ -12,7 +12,6 @@ from rest_framework import serializers
 from rest_framework.fields import Field, SkipField
 from rest_framework import relations
 
-from wagtail.utils.compat import get_related_model
 from wagtail.wagtailcore import fields as wagtailcore_fields
 
 from .utils import get_full_url, pages_for_site