diff -pruN 0.11.1-6/debian/changelog 0.11.1-6ubuntu1/debian/changelog
--- 0.11.1-6/debian/changelog	2025-09-05 22:05:50.000000000 +0000
+++ 0.11.1-6ubuntu1/debian/changelog	2025-10-06 09:45:10.000000000 +0000
@@ -1,3 +1,9 @@
+jpeg-xl (0.11.1-6ubuntu1) questing; urgency=medium
+
+  * Use gcc-14 to avoid miscompilation on ppc64el (LP: #2121375)
+
+ -- Hector Cao <hector.cao@canonical.com>  Mon, 06 Oct 2025 11:45:10 +0200
+
 jpeg-xl (0.11.1-6) unstable; urgency=medium
 
   [ Helmut Grohne ]
diff -pruN 0.11.1-6/debian/control 0.11.1-6ubuntu1/debian/control
--- 0.11.1-6/debian/control	2025-09-05 22:05:50.000000000 +0000
+++ 0.11.1-6ubuntu1/debian/control	2025-10-06 09:45:10.000000000 +0000
@@ -1,5 +1,6 @@
 Source: jpeg-xl
-Maintainer: Debian PhotoTools Maintainers <pkg-phototools-devel@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian PhotoTools Maintainers <pkg-phototools-devel@lists.alioth.debian.org>
 Uploaders: Mathieu Malaterre <malat@debian.org>
 Section: graphics
 Priority: optional
@@ -10,6 +11,7 @@ Build-Depends: asciidoc-base,
                default-jdk:native [amd64 arm64 armel armhf i386 mips64el ppc64el riscv64 s390x alpha ia64 m68k powerpc ppc64 sh4 sparc64 x32] <!nojava>,
                docbook-xml,
                help2man,
+               g++-14 [ppc64el],
                libavif-dev (>= 0.10.1),
                libbrotli-dev,
                libgdk-pixbuf-2.0-dev,
diff -pruN 0.11.1-6/debian/control.in 0.11.1-6ubuntu1/debian/control.in
--- 0.11.1-6/debian/control.in	2025-09-05 22:05:50.000000000 +0000
+++ 0.11.1-6ubuntu1/debian/control.in	2025-10-06 09:45:10.000000000 +0000
@@ -1,5 +1,6 @@
 Source: jpeg-xl
-Maintainer: Debian PhotoTools Maintainers <pkg-phototools-devel@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian PhotoTools Maintainers <pkg-phototools-devel@lists.alioth.debian.org>
 Uploaders: Mathieu Malaterre <malat@debian.org>
 Section: graphics
 Priority: optional
diff -pruN 0.11.1-6/debian/rules 0.11.1-6ubuntu1/debian/rules
--- 0.11.1-6/debian/rules	2025-09-05 22:05:50.000000000 +0000
+++ 0.11.1-6ubuntu1/debian/rules	2025-10-06 09:45:10.000000000 +0000
@@ -57,6 +57,13 @@ else
   BUILD_TESTING=OFF
 endif
 
+# ppc64el build is broken with GCC-15 (LP: #2121375)
+# work-around this issue by pinning ppc64el build to GCC-14
+ifeq ($(DEB_HOST_ARCH),$(filter $(DEB_HOST_ARCH),ppc64el))
+  export CC = /usr/bin/gcc-14
+  export CXX = /usr/bin/g++-14
+endif
+
 %:
 	dh $@ --buildsystem=cmake+ninja