diff --git a/docs/advanced_topics/images/custom_image_model.rst b/docs/advanced_topics/images/custom_image_model.rst
index c6a22216b..8fcbc4ef9 100644
--- a/docs/advanced_topics/images/custom_image_model.rst
+++ b/docs/advanced_topics/images/custom_image_model.rst
@@ -89,6 +89,8 @@ Then set the ``WAGTAILIMAGES_IMAGE_MODEL`` setting to point to it:
     Any templates that reference the builtin image model will still continue to
     work as before but would need to be updated in order to see any new images.
 
+.. _custom_image_model_referring_to_image_model:
+
 Referring to the image model
 ============================
 
diff --git a/docs/releases/1.8.rst b/docs/releases/1.8.rst
index a8b3b2fb2..eb0d4033a 100644
--- a/docs/releases/1.8.rst
+++ b/docs/releases/1.8.rst
@@ -23,3 +23,8 @@ Bug fixes
 
 Upgrade considerations
 ======================
+
+``wagtail.wagtailimages.models.get_image_model`` has moved
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The ``get_image_model`` function should now be imported from ``wagtail.wagtailimages`` rather than ``wagtail.wagtailimages.models``. See :ref:`custom_image_model_referring_to_image_model`.
\ No newline at end of file