diff --git a/vars.mk b/vars.mk
index 567072440c2..3f267c4a0bf 100644
--- a/vars.mk
+++ b/vars.mk
@@ -5,4 +5,5 @@ SBINDIR	?= $(PREFIX)/sbin
 LIBDIR	?= $(PREFIX)/lib
 
 CPPFLAGS += -I../include
+CFLAGS += -Wstack-protector -fstack-protector-all
 CFLAGS += -O2 -Wall -Werror -fPIC -DPIC