diff --git a/guest/authfs/Android.bp b/guest/authfs/Android.bp
index d7a8322..28e0f4a 100644
--- a/guest/authfs/Android.bp
+++ b/guest/authfs/Android.bp
@@ -47,5 +47,8 @@
 rust_binary {
     name: "authfs",
     defaults: ["authfs_defaults"],
-    apex_available: ["com.android.virt"],
+    // //apex_available:platform is necessary here to counteract the
+    // com.android.virt in crosvm_defaults and make authfs available
+    // to the platform so it can be embedded in the microdroid image.
+    apex_available: ["//apex_available:platform"],
 }