diff --git a/spack.changes b/spack.changes
index 14e6ead..97327ea 100644
--- a/spack.changes
+++ b/spack.changes
@@ -1,7 +1,7 @@
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 Mon Jan  6 19:01:00 UTC 2025 - Egbert Eich <eich@suse.com>
 
-- Work towards a reproducible doc build.
+- Work towards a reproducible doc build (boo#1235144):
   When building documentation, hard code:
   * year for license.
   * cpu count dependent settings.