diff --git a/Android.bp b/Android.bp
index 11c03b4..d74e78f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -792,6 +792,7 @@
         "libcurl_http_fetcher_unittest.cc",
         "payload_consumer/bzip_extent_writer_unittest.cc",
         "payload_consumer/cached_file_descriptor_unittest.cc",
+        "payload_consumer/cow_writer_file_descriptor_unittest.cc",
         "payload_consumer/certificate_parser_android_unittest.cc",
         "payload_consumer/delta_performer_integration_test.cc",
         "payload_consumer/delta_performer_unittest.cc",