diff --git a/doc/release_notes.rst b/doc/release_notes.rst
index 0294d2d0..230fc67d 100644
--- a/doc/release_notes.rst
+++ b/doc/release_notes.rst
@@ -1,5 +1,5 @@
 ..
-  SPDX-FileCopyrightText: 2019-2020 The PyPSA-Eur Authors
+  SPDX-FileCopyrightText: 2019-2021 The PyPSA-Eur Authors
 
   SPDX-License-Identifier: CC-BY-4.0
 
@@ -23,6 +23,7 @@ Upcoming Release
 * Bugfix in :mod:`solve_operations_network`: optimised capacities are now fixed for all extendable links, not only HVDC links [`#244 <https://github.com/PyPSA/pypsa-eur/pull/244>`_].
 * The ``focus_weights`` are now also considered when pre-clustering in the :mod:`simplify_network` rule [`#241 <https://github.com/PyPSA/pypsa-eur/pull/241>`_].
 * Continuous integration testing switches to Github Actions from Travis CI [`#252 <https://github.com/PyPSA/pypsa-eur/pull/252>`_].
+* Bugfix in :mod:`build_renewable_profile` where offshore wind profiles could no longer be created [`#249 <https://github.com/PyPSA/pypsa-eur/pull/249>`_].
 
 PyPSA-Eur 0.3.0 (7th December 2020)
 ==================================
diff --git a/scripts/build_renewable_profiles.py b/scripts/build_renewable_profiles.py
index f7e1bc7f..111eb772 100644
--- a/scripts/build_renewable_profiles.py
+++ b/scripts/build_renewable_profiles.py
@@ -183,6 +183,7 @@ import progressbar as pgb
 import geopandas as gpd
 import xarray as xr
 import numpy as np
+import functools
 import atlite
 import logging
 from pypsa.geo import haversine
@@ -235,7 +236,10 @@ if __name__ == '__main__':
         excluder.add_raster(paths.corine, codes=codes, buffer=buffer, crs=3035)
 
     if "max_depth" in config:
-        func = lambda v: v <= -config['max_depth']
+        # lambda not supported for atlite + multiprocessing
+        # use named function np.greater with partially frozen argument instead
+        # and exclude areas where: -max_depth > grid cell depth
+        func = functools.partial(np.greater,-config['max_depth'])
         excluder.add_raster(paths.gebco, codes=func, crs=4236, nodata=-1000)
 
     if 'min_shore_distance' in config: