diff --git a/CHANGES.rst b/CHANGES.rst
index d697983..5e18f09 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,6 +2,21 @@ Changelog
 =========
 
 
+.. _changes-1_5_1:
+
+1.5.1 (2024-10-25)
+~~~~~~~~~~~~~~~~~~
+
+Bug fixes and minor changes
+---------------------------
+
++ `#165`_: Fix missing documentation on the environment injected by
+  :class:`icat.ingest.IngestReader` into the input as changed in
+  1.5.0.
+
+.. _#165: https://github.com/icatproject/python-icat/pull/165
+
+
 .. _changes-1_5_0:
 
 1.5.0 (2024-10-11)
diff --git a/doc/src/ingest.rst b/doc/src/ingest.rst
index 8a33b08..9360ee1 100644
--- a/doc/src/ingest.rst
+++ b/doc/src/ingest.rst
@@ -91,12 +91,21 @@ following attributes:
     :attr:`icat.client.Client.apiversion` attribute of the `client`
     object being used by this :class:`~icat.ingest.IngestReader`.
 
+  `dataset_complete`
+    The value of :attr:`~icat.ingest.IngestReader.Dataset_complete`.
+
+  `datasettype_name`
+    The value of :attr:`~icat.ingest.IngestReader.DatasetType_name`.
+
 More attributes may be added in future versions.  This
 ``_environment`` element may be used by the XSLT in order to adapt the
 result of the transformation to the environment, in particular to
 adapt the output to the ICAT schema version it is supposed to conform
 to.
 
+.. versionchanged:: 1.5.0
+   add attributes `dataset_complete` and `datasettype_name`.
+
 
 .. _ingest-example: