diff --git a/BoardConfig.mk b/BoardConfig.mk
index 18fc71a..4960531 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -95,6 +95,9 @@ BOARD_USES_QCOM_HARDWARE := true
 # Recovery
 TARGET_RECOVERY_PIXEL_FORMAT := "RGBX_8888"
 
+# Releasetools
+TARGET_RELEASETOOLS_EXTENSIONS := $(DEVICE_PATH)
+
 # Sepolicy
 TARGET_SEPOLICY_DIR := msmsteppe
 include device/qcom/sepolicy/sepolicy.mk
diff --git a/releasetools.py b/releasetools.py
new file mode 100644
index 0000000..e076d3f
--- /dev/null
+++ b/releasetools.py
@@ -0,0 +1,37 @@
+# Copyright (C) 2009 The Android Open Source Project
+# Copyright (C) 2019 The Mokee Open Source Project
+# Copyright (C) 2020 The LineageOS Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import common
+import re
+
+def FullOTA_InstallEnd(info):
+  OTA_InstallEnd(info)
+  return
+
+def IncrementalOTA_InstallEnd(info):
+  OTA_InstallEnd(info)
+  return
+
+def AddImage(info, basename, dest):
+  name = basename
+  data = info.input_zip.read("IMAGES/" + basename)
+  common.ZipWriteStr(info.output_zip, name, data)
+  info.script.AppendExtra('package_extract_file("%s", "%s");' % (name, dest))
+
+def OTA_InstallEnd(info):
+  info.script.Print("Patching firmware images...")
+  AddImage(info, "vbmeta.img", "/dev/block/bootdevice/by-name/vbmeta")
+  return