diff --git a/modules/twainui/dialog_progress_ui.cpp b/modules/twainui/dialog_progress_ui.cpp
index 57a5798e..8a3403c3 100644
--- a/modules/twainui/dialog_progress_ui.cpp
+++ b/modules/twainui/dialog_progress_ui.cpp
@@ -15,6 +15,7 @@ Dialog_progress_ui::Dialog_progress_ui(class Manager *mgr, std::function<void (u
     , m_imageRecivedCount(0)
     , m_isScanning(false)
     , m_thread(nullptr)
+    , m_thread_cancelScan(nullptr)
 {
     ui->setupUi(this);
 
@@ -49,6 +50,10 @@ Dialog_progress_ui::~Dialog_progress_ui()
 {
     HGBase_CloseThread(m_thread);
     m_thread = nullptr;
+
+    HGBase_CloseThread(m_thread_cancelScan);
+    m_thread_cancelScan = nullptr;
+
     m_mgr->m_progressUi = nullptr;
 
     delete ui;
@@ -73,7 +78,10 @@ void Dialog_progress_ui::closeEvent(QCloseEvent* e)
 void Dialog_progress_ui::on_pbtn_cancelScan_clicked()
 {
     if (!quit_)
-        m_callback(UI_RESULT_CLOSE_CANCEL);
+    {
+        HGBase_OpenThread(CancelScanThreadFunc, this, &m_thread_cancelScan);
+    }
+
     ui->pbtn_cancelScan->setVisible(false);
     ui->label->setText(tr("stop scanning"));
 }
@@ -137,6 +145,13 @@ void HGAPI Dialog_progress_ui::ThreadFunc(HGThread thread, HGPointer param)
         p->m_callback(UI_RESULT_CLOSE_NORMAL);
 }
 
+void HGAPI Dialog_progress_ui::CancelScanThreadFunc(HGThread thread, HGPointer param)
+{
+    Dialog_progress_ui* p = (Dialog_progress_ui*)param;
+    if (p->m_callback)
+        p->m_callback(UI_RESULT_CLOSE_CANCEL);
+}
+
 void Dialog_progress_ui::FuncNotify(int event, void *msg, int flag)
 {
     Dialog_progress_ui *p = (Dialog_progress_ui *)g_manager->m_progressUi;
diff --git a/modules/twainui/dialog_progress_ui.h b/modules/twainui/dialog_progress_ui.h
index b8dd5c6b..d0cec98f 100644
--- a/modules/twainui/dialog_progress_ui.h
+++ b/modules/twainui/dialog_progress_ui.h
@@ -39,6 +39,7 @@ private slots:
 
 public:
     static void HGAPI ThreadFunc(HGThread thread, HGPointer param);
+    static void HGAPI CancelScanThreadFunc(HGThread thread, HGPointer param);
     static void FuncNotify(int event, void *msg, int flag);
     void clear_callback(void)
     {
@@ -56,6 +57,7 @@ private:
     QTimer *m_timer;
     bool m_isScanning;
     HGThread m_thread;
+    HGThread m_thread_cancelScan;
 };
 
 #endif // DIALOG_PROGRESS_UI_H