diff --git a/download_action.cc b/download_action.cc
index 8a18f43..b2055c8 100644
--- a/download_action.cc
+++ b/download_action.cc
@@ -21,13 +21,15 @@
 const size_t kFileWriterBufferSize = 128 * 1024;  // 128 KiB
 
 DownloadAction::DownloadAction(PrefsInterface* prefs,
+                               SystemState* system_state,
                                HttpFetcher* http_fetcher)
     : prefs_(prefs),
       writer_(NULL),
       http_fetcher_(http_fetcher),
       code_(kActionCodeSuccess),
       delegate_(NULL),
-      bytes_received_(0) {}
+      bytes_received_(0),
+      system_state_(system_state) {}
 
 DownloadAction::~DownloadAction() {}
 
@@ -44,7 +46,9 @@
   if (writer_) {
     LOG(INFO) << "Using writer for test.";
   } else {
-    delta_performer_.reset(new DeltaPerformer(prefs_, &install_plan_));
+    delta_performer_.reset(new DeltaPerformer(prefs_,
+                                              system_state_,
+                                              &install_plan_));
     writer_ = delta_performer_.get();
   }
   int rc = writer_->Open(install_plan_.install_path.c_str(),