diff --git a/share/mk/bsd.sys.mk b/share/mk/bsd.sys.mk
index 6341800d5c70..dfcd1f3b5793 100644
--- a/share/mk/bsd.sys.mk
+++ b/share/mk/bsd.sys.mk
@@ -239,8 +239,11 @@ CFLAGS.clang+=	 -Qunused-arguments
 # but not yet.
 CXXFLAGS.clang+=	 -Wno-c++11-extensions
 
+# XXX: powerpc64 and powerpc64le added temporarily due to regression on
+#      llvm12 and later when -On and -fstack-protector-strong are used
 .if ${MK_SSP} != "no" && \
-    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
+    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" && \
+    ${MACHINE_ARCH} != "powerpc64" && ${MACHINE_ARCH} == "powerpc64le"
 # Don't use -Wstack-protector as it breaks world with -Werror.
 SSP_CFLAGS?=	-fstack-protector-strong
 CFLAGS+=	${SSP_CFLAGS}