diff --git a/SConstruct b/SConstruct
index 98f47a9..720c281 100644
--- a/SConstruct
+++ b/SConstruct
@@ -272,6 +272,7 @@
                             extent_mapper_unittest.cc
                             extent_ranges_unittest.cc
                             extent_writer_unittest.cc
+                            fake_prefs.cc
                             fake_system_state.cc
                             file_writer_unittest.cc
                             filesystem_copier_action_unittest.cc