diff --git a/aconfig/Android.bp b/aconfig/Android.bp
index 40aeee4..b9f09d2 100644
--- a/aconfig/Android.bp
+++ b/aconfig/Android.bp
@@ -36,6 +36,9 @@
 // but other verticals/platforms can override via soong config setting.
 all_aconfig_declarations {
     name: "all_aconfig_declarations",
+    visibility: [
+        "//vendor:__subpackages__", // for vendor extensions
+    ],
     api_signature_files: select(soong_config_variable("android_aconfig", "opt_platform_api_srcs"), {
         default: [
             ":frameworks-base-api-current.txt",