diff --git a/SConstruct b/SConstruct
index 0030bd5..a79a8a8 100644
--- a/SConstruct
+++ b/SConstruct
@@ -304,6 +304,8 @@
                             filesystem_iterator_unittest.cc
                             flimflam_proxy_unittest.cc
                             full_update_generator_unittest.cc
+                            gpio_handler_unittest.cc
+                            gpio_mock_udev_interface.cc
                             graph_utils_unittest.cc
                             http_fetcher_unittest.cc
                             metadata_unittest.cc