diff --git a/apex/Android.bp b/apex/Android.bp
index 505c3fc..380b4c6 100644
--- a/apex/Android.bp
+++ b/apex/Android.bp
@@ -76,6 +76,10 @@
     // entry.
     shared_library: false,
 
+    // Prevent dependencies that do not specify an sdk_version from accessing the
+    // implementation library by default and force them to use stubs instead.
+    default_to_stubs: true,
+
     // Enable api lint. This will eventually become the default for java_sdk_library
     // but it cannot yet be turned on because some usages have not been cleaned up.
     // TODO(b/156126315) - Remove when no longer needed.