1 files changed, 5 insertions, 0 deletions
diff --git a/src/core/download_manager_delegate_qt.h b/src/core/download_manager_delegate_qt.h
index a2511fce7..fea965749 100644
--- a/src/core/download_manager_delegate_qt.h
+++ b/src/core/download_manager_delegate_qt.h
@@ -51,8 +51,11 @@ class DownloadItem;
 class WebContents;
 }
 
+namespace QtWebEngineCore {
 class BrowserContextAdapter;
 class DownloadManagerDelegateInstance;
+class DownloadTargetHelper;
+
 class DownloadManagerDelegateQt
         : public content::DownloadManagerDelegate
         , public content::DownloadItem::Observer
@@ -86,4 +89,6 @@ private:
     DISALLOW_COPY_AND_ASSIGN(DownloadManagerDelegateQt);
 };
 
+} // namespace QtWebEngineCore
+
 #endif //DOWNLOAD_MANAGER_DELEGATE_QT_H