diff --git a/AUTHORS.rst b/AUTHORS.rst
index 2f2e29442..b8fd617c7 100644
--- a/AUTHORS.rst
+++ b/AUTHORS.rst
@@ -41,3 +41,4 @@ Contributors
 * Maliko Tanguy <malngu@ceh.ac.uk> `@malngu <https://github.com/malngu>`_
 * Christopher Whelan `@qwhelan <https://github.com/qwhelan>`_
 * Dante Castro <dante.castro@hereon.de> `@profesorpaiche <https://github.com/profesorpaiche>`_
+* Sascha Hofmann <sascha.hofmann@lobelia.earth> `@saschahofmann <https://github.com/saschahofmann>`_
diff --git a/CHANGES.rst b/CHANGES.rst
index 869d33a4f..fd17a8049 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -13,6 +13,7 @@ Announcements
 Bug fixes
 ^^^^^^^^^
 * Fixed an bug in sdba's ``map_groups`` that prevented passing DataArrays with cftime coordinates if the ``sdba_encode_cf`` option was True. (:issue:`1673`, :pull:`1674`).
+* Fixed bug (:issue:`1678`, :pull:`1679`) in sdba where a loaded training dataset could not be used for adjustment
 
 Internal changes
 ^^^^^^^^^^^^^^^^
diff --git a/xclim/sdba/base.py b/xclim/sdba/base.py
index 2a1eabf90..0d40e716e 100644
--- a/xclim/sdba/base.py
+++ b/xclim/sdba/base.py
@@ -611,7 +611,7 @@ def _map_blocks(ds, **kwargs):  # noqa: C901
                     {
                         dim: chunks.get(dim)
                         for dim in reduced_dims
-                        if len(chunks.get(dim)) > 1
+                        if len(chunks.get(dim, [])) > 1
                     }
                 )
                 if badchunks: