diff --git a/pod/perldelta.pod b/pod/perldelta.pod
index 8a3637d4f01e..80a7488d0dae 100644
--- a/pod/perldelta.pod
+++ b/pod/perldelta.pod
@@ -125,9 +125,11 @@ XXX Remove this section if Porting/corelist-perldelta.pl did not add any content
 
 =item *
 
-L<XXX> has been upgraded from version A.xx to B.yy.
+L<Errno> has been upgraded from version 1.37 to 1.38.
 
-XXX If there was something important to note about this change, include that here.
+The C<osvers> and C<archname> baked into the module to ensure Errno is
+loaded by the perl that built it are now more comprehensively
+escaped. [GH #21135]
 
 =back