diff --git a/SConstruct b/SConstruct
index 78e50b6..fe6170d 100644
--- a/SConstruct
+++ b/SConstruct
@@ -247,6 +247,7 @@
                    certificate_checker.cc
                    chrome_browser_proxy_resolver.cc
                    chrome_proxy_resolver.cc
+                   clock.cc
                    connection_manager.cc
                    constants.cc
                    cycle_breaker.cc