diff --git a/src/contentmanager.cpp b/src/contentmanager.cpp
index b6fe499..b9cd56a 100644
--- a/src/contentmanager.cpp
+++ b/src/contentmanager.cpp
@@ -154,7 +154,7 @@ ContentManager::ContentManager(Library* library, kiwix::Downloader* downloader)
     }
 }
 
-void ContentManager::startDownloadUpdaterThread()
+void DownloadManager::startDownloadUpdaterThread()
 {
     // so that DownloadInfo can be copied across threads
     qRegisterMetaType<DownloadInfo>("DownloadInfo");
@@ -168,7 +168,7 @@ void ContentManager::startDownloadUpdaterThread()
     mp_downloadUpdaterThread->start();
 }
 
-ContentManager::~ContentManager()
+DownloadManager::~DownloadManager()
 {
     if ( mp_downloadUpdaterThread )
     {
diff --git a/src/contentmanager.h b/src/contentmanager.h
index 18f8fad..c51b319 100644
--- a/src/contentmanager.h
+++ b/src/contentmanager.h
@@ -59,7 +59,6 @@ public: // types
 
 public: // functions
     ContentManager(Library* library, kiwix::Downloader *downloader);
-    virtual ~ContentManager();
 
     ContentManagerView* getView() { return mp_view; }
     void setLocal(bool local);
@@ -122,7 +121,6 @@ private: // functions
     const kiwix::Book& getRemoteOrLocalBook(const QString &id);
     QString getRemoteLibraryUrl() const;
 
-    void startDownloadUpdaterThread();
     std::string startDownload(const kiwix::Book& book);
     void removeDownload(QString bookId);
     void downloadStarted(const kiwix::Book& book, const std::string& downloadId);
@@ -132,7 +130,6 @@ private: // functions
 private: // data
     Library* mp_library;
     kiwix::LibraryPtr mp_remoteLibrary;
-    QThread* mp_downloadUpdaterThread = nullptr;
     OpdsRequestManager m_remoteLibraryManager;
     ContentManagerView* mp_view;
     bool m_local = true;
diff --git a/src/downloadmanagement.h b/src/downloadmanagement.h
index fc9d50e..5ff95d7 100644
--- a/src/downloadmanagement.h
+++ b/src/downloadmanagement.h
@@ -70,6 +70,9 @@ private:
 
 public: // functions
     DownloadManager(const Library* lib, kiwix::Downloader *downloader);
+    virtual ~DownloadManager();
+
+    void startDownloadUpdaterThread();
 
     DownloadInfo getDownloadInfo(QString bookId) const;
     void restoreDownloads();
@@ -97,6 +100,7 @@ protected: // data
 
 private:
     Downloads                m_downloads;
+    QThread*                 mp_downloadUpdaterThread = nullptr;
 };
 
 #endif // DOWNLOADMANAGEMENT_H