diff --git a/rebootescrow/aidl/Android.bp b/rebootescrow/aidl/Android.bp
index 39aaa07..3d5b827 100644
--- a/rebootescrow/aidl/Android.bp
+++ b/rebootescrow/aidl/Android.bp
@@ -10,6 +10,7 @@
 aidl_interface {
     name: "android.hardware.rebootescrow",
     vendor_available: true,
+    frozen: true,
     srcs: [
         "android/hardware/rebootescrow/IRebootEscrow.aidl",
     ],