diff --git a/share/mk/bsd.sys.mk b/share/mk/bsd.sys.mk
index e438633..de4a05b 100644
--- a/share/mk/bsd.sys.mk
+++ b/share/mk/bsd.sys.mk
@@ -111,12 +111,18 @@ CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 CFLAGS+=	 -Qunused-arguments
 .endif # CLANG
 
-.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \
-    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
+.if ${MACHINE_CPUARCH} != "ia64" && ${MACHINE_CPUARCH} != "arm" \
+    && ${MACHINE_CPUARCH} != "mips"
+.if ${MK_SSP} != "no"
 # Don't use -Wstack-protector as it breaks world with -Werror.
 SSP_CFLAGS?=	-fstack-protector
+.else
+# gcc-4.9, -fstack-protector-strong is enabled by default.
+# Add -fno-stack-protector to disable it. Gentoo Bug #511698.
+SSP_CFLAGS=	-fno-stack-protector
+.endif #SSP
 CFLAGS+=	${SSP_CFLAGS}
-.endif # SSP && !IA64 && !ARM && !MIPS
+.endif # !IA64 && !ARM && !MIPS
 
 # Allow user-specified additional warning flags
 CFLAGS+=	${CWARNFLAGS}