diff --git a/gnu/packages/image-processing.scm b/gnu/packages/image-processing.scm
index f944a61186..2795eaf130 100644
--- a/gnu/packages/image-processing.scm
+++ b/gnu/packages/image-processing.scm
@@ -1,7 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2017 John Darrington <jmd@gnu.org>
 ;;; Copyright © 2017, 2019 Ricardo Wurmus <rekado@elephly.net>
-;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014, 2021 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2016 Eric Bavier <bavier@member.fsf.org>
 ;;; Copyright © 2018–2021 Tobias Geerinckx-Rice <me@tobias.gr>
@@ -270,6 +270,7 @@ (define-public vtk
                       "glew" "hdf5" "jpeg" "jsoncpp" "libproj" "libxml2" "lz4"
                       "netcdf" "ogg" "png" "sqlite" "theora" "tiff" "zlib"))
                   #t))))
+    (properties `((release-monitoring-url . "https://vtk.org/download/")))
     (build-system cmake-build-system)
     (arguments
      '(#:build-type "Release"           ;Build without '-g' to save space.