diff --git a/update_engine.gyp b/update_engine.gyp
index 41ee1e8..0e0ba9f 100644
--- a/update_engine.gyp
+++ b/update_engine.gyp
@@ -185,6 +185,7 @@
         'common/terminator.cc',
         'common/utils.cc',
         'payload_consumer/bzip_extent_writer.cc',
+        'payload_consumer/cached_file_descriptor.cc',
         'payload_consumer/delta_performer.cc',
         'payload_consumer/download_action.cc',
         'payload_consumer/extent_reader.cc',
@@ -530,6 +531,7 @@
             'omaha_utils_unittest.cc',
             'p2p_manager_unittest.cc',
             'payload_consumer/bzip_extent_writer_unittest.cc',
+            'payload_consumer/cached_file_descriptor_unittest.cc',
             'payload_consumer/delta_performer_integration_test.cc',
             'payload_consumer/delta_performer_unittest.cc',
             'payload_consumer/download_action_unittest.cc',