diff --git a/perl-XML-LibXML.spec b/perl-XML-LibXML.spec
index cc9ab9d..9dae4ce 100644
--- a/perl-XML-LibXML.spec
+++ b/perl-XML-LibXML.spec
@@ -1,4 +1,6 @@
 Name:           perl-XML-LibXML
+# NOTE: also update perl-XML-LibXSLT to the same version, see
+# https://bugzilla.redhat.com/show_bug.cgi?id=469480
 Version:        1.66
 Release:        2%{?dist}
 # Epoch set when version went from 1.62001 to 1.65