diff --git a/Makefile b/Makefile
index 73ebad7..3735440 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ INSTALL = install
 LDFLAGS += -Wl,-z,noexecstack -ldl
 CFLAGS ?= -O2 -g
 CFLAGS += -Wall -fPIC
-CPPFLAGS += -D__LIBHUGETLBFS__
+CPPFLAGS += -D__LIBHUGETLBFS__ -DFORTIFY_SOURCE
 
 ARCH = $(shell uname -m | sed -e s/i.86/i386/)
 CC ?= gcc