--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 CC ?= gcc
-AM_CFLAGS = -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2
+AM_CFLAGS = -D_FILE_OFFSET_BITS=64
 CFLAGS ?= -g -O2
 objects = \
 	mmc.o \