diff --git a/oemlock/aidl/Android.bp b/oemlock/aidl/Android.bp
index 1c19bb1..f4533ed 100644
--- a/oemlock/aidl/Android.bp
+++ b/oemlock/aidl/Android.bp
@@ -10,6 +10,7 @@
 aidl_interface {
     name: "android.hardware.oemlock",
     vendor_available: true,
+    frozen: true,
     srcs: ["android/hardware/oemlock/*.aidl"],
     stability: "vintf",
     backend: {