diff -pruN 0.7.0-9/debian/changelog 0.7.0-9ubuntu1/debian/changelog
--- 0.7.0-9/debian/changelog	2023-01-05 08:00:37.000000000 +0000
+++ 0.7.0-9ubuntu1/debian/changelog	2023-01-17 23:27:11.000000000 +0000
@@ -1,3 +1,9 @@
+jpeg-xl (0.7.0-9ubuntu1) lunar; urgency=medium
+
+  * Export O2 on ppc64el to fix a build failure
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Wed, 18 Jan 2023 00:27:11 +0100
+
 jpeg-xl (0.7.0-9) unstable; urgency=medium
 
   * d/tests: Adapt test to latest change
diff -pruN 0.7.0-9/debian/rules 0.7.0-9ubuntu1/debian/rules
--- 0.7.0-9/debian/rules	2023-01-04 10:57:01.000000000 +0000
+++ 0.7.0-9ubuntu1/debian/rules	2023-01-17 23:27:09.000000000 +0000
@@ -23,6 +23,10 @@ ifneq (,$(filter $(DEB_HOST_ARCH), armhf
   DEB_CXXFLAGS_MAINT_APPEND += -fno-tree-vectorize
 endif
 
+ifeq (ppc64el, $(DEB_HOST_ARCH))
+  DEB_CXXFLAGS_MAINT_APPEND += -O2
+endif
+
 ifneq (,$(filter $(DEB_HOST_ARCH), arm64 armel armhf ppc64el))
   # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728
   DEB_CXXFLAGS_MAINT_APPEND += -Wno-psabi