diff --git a/SConstruct b/SConstruct
index e92a895..5bfbec7 100644
--- a/SConstruct
+++ b/SConstruct
@@ -103,6 +103,7 @@
                    postinstall_runner_action.cc
                    set_bootable_flag_action.cc
                    subprocess.cc
+                   tarjan.cc
                    update_check_action.cc
 		               update_metadata.pb.cc
 		               utils.cc""")
@@ -130,6 +131,7 @@
                             postinstall_runner_action_unittest.cc
                             set_bootable_flag_action_unittest.cc
                             subprocess_unittest.cc
+                            tarjan_unittest.cc
                             test_utils.cc
                             update_check_action_unittest.cc
                             utils_unittest.cc""")