diff --git a/common/dlcservice_stub.cc b/common/dlcservice_stub.cc
index c5f9306..3dcb2e0 100644
--- a/common/dlcservice_stub.cc
+++ b/common/dlcservice_stub.cc
@@ -33,4 +33,11 @@
   return true;
 }
 
+bool DlcServiceStub::InstallCompleted(const vector<string>& ids) {
+  return true;
+}
+bool DlcServiceStub::UpdateCompleted(const vector<string>& ids) {
+  return true;
+}
+
 }  // namespace chromeos_update_engine