diff --git a/client/ui_base.cpp b/client/ui_base.cpp
index c965a40..f9530a0 100644
--- a/client/ui_base.cpp
+++ b/client/ui_base.cpp
@@ -243,13 +243,21 @@ void UI_base::process_ui_label(json &ui_item, QWidget *widget)
 void UI_base::process_ui_slider(json &ui_item, QWidget *widget)
 {
     QLabel *label = id_to_label(id_to_ui(ui_item.at("id")));
-
+#ifdef __WIN32
+    if (!widget->inherits("QwtSlider"))
+    {
+        LOG_WARN("widget is not of type QwtSlider");
+        return;
+    }
+    auto slider = static_cast<QwtSlider *>(widget);
+#else
     auto slider = qobject_cast<QwtSlider *>(widget);
     if (slider == nullptr)
     {
         LOG_WARN("widget is not of type QwtSlider");
         return;
     }
+#endif
 
     double value = ui_item.at("value");
     bool enable = ui_item.at("enabled");
@@ -283,12 +291,21 @@ void UI_base::process_ui_dial(json &ui_item, QWidget *widget)
 {
     QLabel *label = id_to_label(id_to_ui(ui_item.at("id")));
 
+#ifdef __WIN32
+    if (!widget->inherits("QwtDial"))
+    {
+        LOG_WARN("widget is not of type QwtDial");
+        return;
+    }
+    auto dial = static_cast<QwtDial *>(widget);
+#else
     auto dial = qobject_cast<QwtDial *>(widget);
     if (dial == nullptr)
     {
         LOG_WARN("widget is not of type QwtDial");
         return;
     }
+#endif
 
     double value = ui_item.at("value");
     bool visible = ui_item.at("visible");
@@ -315,12 +332,21 @@ void UI_base::process_ui_thermo(json &ui_item, QWidget *widget)
 {
     QLabel *label = id_to_label(id_to_ui(ui_item.at("id")));
 
+#ifdef __WIN32
+    if (!widget->inherits("QwtThermo"))
+    {
+        LOG_WARN("widget is not of type QwtThermo");
+        return;
+    }
+    auto thermo = static_cast<QwtThermo *>(widget);
+#else
     auto thermo = qobject_cast<QwtThermo *>(widget);
     if (thermo == nullptr)
     {
         LOG_WARN("widget is not of type QwtThermo");
         return;
     }
+#endif
 
     double value = ui_item.at("value");
     bool visible = ui_item.at("visible");
@@ -1010,18 +1036,42 @@ void UI_base::setup_checkbox(QWidget *item, size_t index)
 
 void UI_base::setup_dial(QWidget *item, size_t index)
 {
-    QwtDial *dial = qobject_cast<QwtDial *>(item);
-    if (dial == nullptr)
+#ifdef __WIN32
+    if (!item->inherits("QwtDial"))
+    {
+        LOG_WARN("widget is not of type QwtDial");
         return;
+    }
+    auto dial = static_cast<QwtDial *>(item);
+#else
+    auto dial = qobject_cast<QwtDial *>(item);
+    if (dial == nullptr)
+    {
+        LOG_WARN("widget is not of type QwtDial");
+        return;
+    }
+#endif
 
     create_dial_needle(dial);
 }
 
 void UI_base::setup_slider(QWidget *item, size_t index)
 {
-    QwtSlider *slider = qobject_cast<QwtSlider *>(item);
-    if (slider == nullptr)
+#ifdef __WIN32
+    if (!item->inherits("QwtSlider"))
+    {
+        LOG_WARN("widget is not of type QwtSlider");
         return;
+    }
+    auto slider = static_cast<QwtSlider *>(item);
+#else
+    auto slider = qobject_cast<QwtSlider *>(item);
+    if (slider == nullptr)
+    {
+        LOG_WARN("widget is not of type QwtSlider");
+        return;
+    }
+#endif
 
     connect(slider, &QwtSlider::sliderMoved, this,
             [=, this] { m_web_socket->send_event(Web_socket_wrapper::Event::value_changed, index, slider->value()); });