diff --git a/bind.spec b/bind.spec
index 1b5b869..e7bc694 100644
--- a/bind.spec
+++ b/bind.spec
@@ -120,6 +120,7 @@ Patch164:bind-9.11-rh1666814.patch
 Patch170:bind-9.11-feature-test-named.patch
 Patch171:bind-9.11-tests-variants.patch
 Patch172:bind-9.11-tests-pkcs11.patch
+# https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/3323
 Patch173:bind-9.16-libisc-link.patch
 
 Requires(post):   systemd