diff --git a/debian/rules b/debian/rules
index 88d9e548..49442952 100755
--- a/debian/rules
+++ b/debian/rules
@@ -24,6 +24,16 @@ ifeq ($(DEB_HOST_ARCH), riscv64)
   COMMON_CONFIGURE_OPTIONS += -DWLCS_BUILD_TSAN=OFF
 endif
 
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105329
+ifeq ($(DEB_HOST_ARCH), ppc64el)
+  ifneq ($(shell gcc --version | grep '12.[[:digit:]]\+.[[:digit:]]\+$$'),)
+    export DEB_CFLAGS_MAINT_APPEND = -O2
+    export DEB_CXXFLAGS_MAINT_APPEND = -O2
+    export DEB_FCFLAGS_MAINT_APPEND = -O2
+    export DEB_FFLAGS_MAINT_APPEND = -O2
+  endif
+endif
+
 override_dh_auto_configure:
 	dh_auto_configure -- $(COMMON_CONFIGURE_OPTIONS)