diff --git a/src/downloadlist.cpp b/src/downloadlist.cpp
index 1a1b46a..df81fdb 100644
--- a/src/downloadlist.cpp
+++ b/src/downloadlist.cpp
@@ -17,7 +17,7 @@ downloadlist::downloadlist(QWidget *parent) :
     action_dpkg(new QAction),
     action_deepin(new QAction),
     action_gdebi(new QAction),
-    output_w(new DDialog),
+    output_w(new QDialog),
     textbrowser(new QTextBrowser)
 {
     ui->setupUi(this);
diff --git a/src/downloadlist.h b/src/downloadlist.h
index a3c0c45..1fd81fd 100644
--- a/src/downloadlist.h
+++ b/src/downloadlist.h
@@ -8,7 +8,6 @@
 
 #include <QDialog>
 
-DWIDGET_USE_NAMESPACE
 
 namespace Ui {
 class downloadlist;