diff --git a/camera/metadata/aidl/Android.bp b/camera/metadata/aidl/Android.bp
index d7303fc..04241c1 100644
--- a/camera/metadata/aidl/Android.bp
+++ b/camera/metadata/aidl/Android.bp
@@ -13,7 +13,7 @@
     host_supported: true,
     vendor_available: true,
     srcs: ["android/hardware/camera/metadata/*.aidl"],
-    frozen: false,
+    frozen: true,
     stability: "vintf",
     backend: {
         cpp: {
@@ -39,6 +39,10 @@
             version: "3",
             imports: [],
         },
+        {
+            version: "4",
+            imports: [],
+        },
 
     ],