diff -pruN 2.0-4/debian/changelog 2.0-4ubuntu1/debian/changelog
--- 2.0-4/debian/changelog	2023-02-07 17:54:55.000000000 +0000
+++ 2.0-4ubuntu1/debian/changelog	2023-06-07 02:57:07.000000000 +0000
@@ -1,3 +1,9 @@
+libs3 (2.0-4ubuntu1) mantic; urgency=medium
+
+  * d/rules: append -Wno-error=stringop-overread on ppc64el (LP: #2021564)
+
+ -- Shengjing Zhu <shengjing.zhu@canonical.com>  Wed, 07 Jun 2023 02:57:07 +0000
+
 libs3 (2.0-4) unstable; urgency=medium
 
   * Update debhelper level to 13 .
diff -pruN 2.0-4/debian/control 2.0-4ubuntu1/debian/control
--- 2.0-4/debian/control	2023-02-07 17:54:55.000000000 +0000
+++ 2.0-4ubuntu1/debian/control	2023-06-07 02:57:07.000000000 +0000
@@ -1,7 +1,8 @@
 Source: libs3
 Section: net
 Priority: optional
-Maintainer: Laszlo Boszormenyi (GCS) <gcs@debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Laszlo Boszormenyi (GCS) <gcs@debian.org>
 Build-Depends: debhelper-compat (= 13), libxml2-dev, libcurl4-gnutls-dev, pkgconf
 Standards-Version: 4.6.2
 Homepage: https://github.com/bji/libs3
diff -pruN 2.0-4/debian/rules 2.0-4ubuntu1/debian/rules
--- 2.0-4/debian/rules	2023-02-07 17:54:55.000000000 +0000
+++ 2.0-4ubuntu1/debian/rules	2023-06-07 02:57:07.000000000 +0000
@@ -4,6 +4,10 @@
 # Uncomment this to turn on verbose mode.
 #export DH_VERBOSE=1
 
+ifneq (,$(filter $(DEB_HOST_ARCH), ppc64el))
+export DEB_CFLAGS_MAINT_APPEND := -Wno-error=stringop-overread
+endif
+
 DESTDIR = $(CURDIR)/debian/tmp/usr/
 
 override_dh_auto_build: