diff --git a/share/mk/bsd.sys.mk b/share/mk/bsd.sys.mk
index a964cf6e596c..8fffbe434fc3 100644
--- a/share/mk/bsd.sys.mk
+++ b/share/mk/bsd.sys.mk
@@ -239,7 +239,10 @@ CFLAGS.clang+=	 -Qunused-arguments
 # but not yet.
 CXXFLAGS.clang+=	 -Wno-c++11-extensions
 
-.if ${MK_SSP} != "no"
+# 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_ARCH} != "powerpc64" && ${MACHINE_ARCH} != "powerpc64le"
 # Don't use -Wstack-protector as it breaks world with -Werror.
 SSP_CFLAGS?=	-fstack-protector-strong
 CFLAGS+=	${SSP_CFLAGS}