diff --git a/update_engine.gyp b/update_engine.gyp
index aeb4bad..0e89d55 100644
--- a/update_engine.gyp
+++ b/update_engine.gyp
@@ -369,6 +369,7 @@
             'subprocess_unittest.cc',
             'terminator_unittest.cc',
             'test_utils.cc',
+            'test_utils_unittest.cc',
             'update_attempter_unittest.cc',
             'update_manager/boxed_value_unittest.cc',
             'update_manager/chromeos_policy_unittest.cc',