diff --git a/Android.bp b/Android.bp
index c5897b9..1e75e9f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -79,6 +79,7 @@
         "auto_service_annotations",
         "lint_api",
     ],
+    kotlincflags: ["-Xjvm-default=all"],
 }
 
 // TODO: (b/162368644) Implement these (working in gradle) Kotlin Tests to run on Soong