diff --git a/kmines/kzoommainwindow.cpp b/kmines/kzoommainwindow.cpp
index 8d0521bc..178444b8 100644
--- a/kmines/kzoommainwindow.cpp
+++ b/kmines/kzoommainwindow.cpp
@@ -60,7 +60,7 @@ void KZoomMainWindow::addWidget(TQWidget *widget)
   widget->adjustSize();
   TQWidget *tlw = widget->topLevelWidget();
   KZoomMainWindow *zm = 
-    static_cast<KZoomMainWindow *>(tlw->qt_cast("KZoomMainWindow"));
+    static_cast<KZoomMainWindow *>(tlw->tqt_cast("KZoomMainWindow"));
   Q_ASSERT(zm);
   zm->_widgets.append(widget);
   connect(widget, TQT_SIGNAL(destroyed()), zm, TQT_SLOT(widgetDestroyed()));
diff --git a/kreversi/kzoommainwindow.cpp b/kreversi/kzoommainwindow.cpp
index cb7ca04e..95cc682a 100644
--- a/kreversi/kzoommainwindow.cpp
+++ b/kreversi/kzoommainwindow.cpp
@@ -67,7 +67,7 @@ void KZoomMainWindow::addWidget(TQWidget *widget)
 
   TQWidget          *tlw = widget->topLevelWidget();
   KZoomMainWindow  *zm = 
-    static_cast<KZoomMainWindow *>(tlw->qt_cast("KZoomMainWindow"));
+    static_cast<KZoomMainWindow *>(tlw->tqt_cast("KZoomMainWindow"));
 
   Q_ASSERT(zm);
   zm->m_widgets.append(widget);
diff --git a/libksirtet/base/kzoommainwindow.cpp b/libksirtet/base/kzoommainwindow.cpp
index 8d0521bc..178444b8 100644
--- a/libksirtet/base/kzoommainwindow.cpp
+++ b/libksirtet/base/kzoommainwindow.cpp
@@ -60,7 +60,7 @@ void KZoomMainWindow::addWidget(TQWidget *widget)
   widget->adjustSize();
   TQWidget *tlw = widget->topLevelWidget();
   KZoomMainWindow *zm = 
-    static_cast<KZoomMainWindow *>(tlw->qt_cast("KZoomMainWindow"));
+    static_cast<KZoomMainWindow *>(tlw->tqt_cast("KZoomMainWindow"));
   Q_ASSERT(zm);
   zm->_widgets.append(widget);
   connect(widget, TQT_SIGNAL(destroyed()), zm, TQT_SLOT(widgetDestroyed()));