diff --git a/releasetools.py b/releasetools.py
index 0b5b41ec589227ed40f850e7b71d820637162cb1..2504dbd3f1a079e6f4e51a3df229c508ddfa88e9 100644
--- a/releasetools.py
+++ b/releasetools.py
@@ -55,4 +55,4 @@ def OTA_InstallEnd(info, incremental):
   AddFirmware(info, "sspm.img", "/dev/block/by-name/sspm_1", "/dev/block/by-name/sspm_2", incremental)
   AddFirmware(info, "trustzone1.bin", "/dev/block/by-name/tee1", False, incremental)
   AddFirmware(info, "trustzone2.bin", "/dev/block/by-name/tee2", False, incremental)
-  AddFirmware(info, "preloader.img", "/dev/block/mmcblk0boot0", "/dev/block/mmcblk0boot1", incremental)
+  AddFirmware(info, "preloader.img", "/dev/block/platform/bootdevice/by-name/preloader_a", "/dev/block/platform/bootdevice/by-name/preloader_b", incremental)
diff --git a/sepolicy/vendor/init.te b/sepolicy/vendor/init.te
index 8bff3c173c15e8c11c2a010db1f89f8dc502b0b6..1dc18fe18bbc2dc49940500af54c5564700fe06e 100644
--- a/sepolicy/vendor/init.te
+++ b/sepolicy/vendor/init.te
@@ -3,3 +3,7 @@ allow init hwservicemanager:binder call;
 allow init self:netlink_kobject_uevent_socket read;
 allow init sysfs_wake_lock:file r_file_perms;
 allow init vendor_data_file:file w_file_perms;
+# Allow recovery to write to preloader
+recovery_only(`
+  allow init sysfs_devices_block:file w_file_perms;
+')