diff --git a/scripts/freeze-sysprop-api-files.sh b/scripts/freeze-sysprop-api-files.sh
new file mode 100755
index 0000000..1b2ff7c
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+++ b/scripts/freeze-sysprop-api-files.sh
@@ -0,0 +1,39 @@
+#!/bin/bash -e
+
+# Copyright (C) 2019 The Android 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.
+
+# This script freezes APIs of a sysprop_library after checking compatibility
+# between latest API and current API.
+#
+# Usage: freeze-sysprop-api-files.sh <modulePath> <moduleName>
+#
+# <modulePath>: the directory, either relative or absolute, which holds the
+# Android.bp file defining sysprop_library.
+#
+# <moduleName>: the name of sysprop_library to freeze API.
+#
+# Example:
+# $ . build/envsetup.sh && lunch aosp_arm64-user
+# $ . build/soong/scripts/freeze-sysprop-api-files.sh \
+#       system/libsysprop/srcs PlatformProperties
+
+if [[ -z "$1" || -z "$2" ]]; then
+  echo "usage: $0 <modulePath> <moduleName>" >&2
+  exit 1
+fi
+
+api_dir=$1/api
+
+m "$2-check-api" && cp -f "${api_dir}/$2-current.txt" "${api_dir}/$2-latest.txt"