diff --git a/plat/allwinner/common/allwinner-common.mk b/plat/allwinner/common/allwinner-common.mk
index 34fdaf6..cf559fb 100644
--- a/plat/allwinner/common/allwinner-common.mk
+++ b/plat/allwinner/common/allwinner-common.mk
@@ -65,6 +65,23 @@
 $(eval $(call assert_boolean,SUNXI_SETUP_REGULATORS))
 $(eval $(call add_define,SUNXI_SETUP_REGULATORS))
 
+SUNXI_BL31_IN_DRAM	?=	0
+$(eval $(call assert_boolean,SUNXI_BL31_IN_DRAM))
+
+ifeq (${SUNXI_BL31_IN_DRAM},1)
+SUNXI_AMEND_DTB		:=	1
+$(eval $(call add_define,SUNXI_BL31_IN_DRAM))
+endif
+
+SUNXI_AMEND_DTB		?=	0
+$(eval $(call assert_boolean,SUNXI_AMEND_DTB))
+$(eval $(call add_define,SUNXI_AMEND_DTB))
+
+ifeq (${SUNXI_AMEND_DTB},1)
+BL31_SOURCES		+=	common/fdt_fixup.c			\
+				${AW_PLAT}/common/sunxi_prepare_dtb.c
+endif
+
 # The bootloader is guaranteed to only run on CPU 0 by the boot ROM.
 COLD_BOOT_SINGLE_CPU		:=	1