diff -Nru cppzmq-4.9.0/debian/changelog cppzmq-4.9.0/debian/changelog
--- cppzmq-4.9.0/debian/changelog	2022-11-09 20:51:01.000000000 +0000
+++ cppzmq-4.9.0/debian/changelog	2023-01-04 19:08:58.000000000 +0000
@@ -1,3 +1,10 @@
+cppzmq (4.9.0-1~16.04.sav0) xenial; urgency=medium
+
+  * Backport to Xenial
+  * debian/control: Set debhelper-compat (= 10) BD (LP highest for Xenial)
+
+ -- Rob Savoury <savoury@savos.tech>  Wed, 04 Jan 2023 11:08:58 -0800
+
 cppzmq (4.9.0-1) unstable; urgency=medium
 
   [ Debian Janitor ]
diff -Nru cppzmq-4.9.0/debian/control cppzmq-4.9.0/debian/control
--- cppzmq-4.9.0/debian/control	2022-11-09 20:49:33.000000000 +0000
+++ cppzmq-4.9.0/debian/control	2023-01-04 19:08:53.000000000 +0000
@@ -2,7 +2,7 @@
 Priority: optional
 Section: libs
 Maintainer: Stephan Lachnit <stephanlachnit@debian.org>
-Build-Depends: debhelper-compat (= 13),
+Build-Depends: debhelper-compat (= 10),
                cmake,
                libzmq3-dev,
                pkg-config,