diff --git a/automotive/vehicle/aidl/Android.bp b/automotive/vehicle/aidl/Android.bp
index 9aeb4d2..88d1c74 100644
--- a/automotive/vehicle/aidl/Android.bp
+++ b/automotive/vehicle/aidl/Android.bp
@@ -27,6 +27,7 @@
     srcs: [
         "android/hardware/automotive/vehicle/**/*.aidl",
     ],
+    frozen: true,
     stability: "vintf",
     backend: {
         cpp: {