diff --git a/mk_mmc.sh b/mk_mmc.sh
index d2ed268..72c3880 100755
--- a/mk_mmc.sh
+++ b/mk_mmc.sh
@@ -296,15 +296,11 @@ boot_uenv_txt_template () {
 
 	if [ ! "${uboot_fdt_auto_detection}" ] ; then
 		cat >> ${TEMPDIR}/bootscripts/normal.cmd <<-__EOF__
-			initrd_high=0xffffffff
-			fdt_high=0xffffffff
 			fdtfile=${conf_fdtfile}
 
 		__EOF__
 
 		cat >> ${TEMPDIR}/bootscripts/netinstall.cmd <<-__EOF__
-			initrd_high=0xffffffff
-			fdt_high=0xffffffff
 			fdtfile=${conf_fdtfile}
 
 		__EOF__