diff -pruN 2.2.17-3/debian/changelog 2.2.17-3ubuntu1/debian/changelog
--- 2.2.17-3/debian/changelog	2021-01-31 23:16:07.000000000 +0000
+++ 2.2.17-3ubuntu1/debian/changelog	2021-11-26 08:13:49.000000000 +0000
@@ -1,3 +1,9 @@
+gnubiff (2.2.17-3ubuntu1) jammy; urgency=medium
+
+  * d/rules: force G++ to use C++14 (Closes: #984159)
+
+ -- Simon Chopin <simon.chopin@canonical.com>  Fri, 26 Nov 2021 09:13:49 +0100
+
 gnubiff (2.2.17-3) unstable; urgency=medium
 
   * QA upload.
diff -pruN 2.2.17-3/debian/control 2.2.17-3ubuntu1/debian/control
--- 2.2.17-3/debian/control	2021-01-31 23:15:57.000000000 +0000
+++ 2.2.17-3ubuntu1/debian/control	2021-11-26 08:13:49.000000000 +0000
@@ -1,7 +1,8 @@
 Source: gnubiff
 Section: mail
 Priority: optional
-Maintainer: Debian QA Group <packages@qa.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian QA Group <packages@qa.debian.org>
 Build-Depends: debhelper (>= 11),
                intltool,
                libaudiofile-dev,
diff -pruN 2.2.17-3/debian/rules 2.2.17-3ubuntu1/debian/rules
--- 2.2.17-3/debian/rules	2018-10-16 22:37:55.000000000 +0000
+++ 2.2.17-3ubuntu1/debian/rules	2021-11-26 08:13:33.000000000 +0000
@@ -1,5 +1,6 @@
 #!/usr/bin/make -f
 
+export DEB_CXXFLAGS_MAINT_APPEND=-std=c++14
 %:
 	dh $@