diff --git a/src/dolphindockwidget.cpp b/src/dolphindockwidget.cpp
index 0d8aea7bdf..6495c8da96 100644
--- a/src/dolphindockwidget.cpp
+++ b/src/dolphindockwidget.cpp
@@ -21,6 +21,14 @@
 
 #include <QStyle>
 
+namespace {
+    // Disable the 'Floatable' feature, i.e., the possibility to drag the
+    // dock widget out of the main window. This works around problems like
+    // https://bugs.kde.org/show_bug.cgi?id=288629
+    // https://bugs.kde.org/show_bug.cgi?id=322299
+    const QDockWidget::DockWidgetFeatures DefaultDockWidgetFeatures = QDockWidget::DockWidgetMovable | QDockWidget::DockWidgetClosable;
+}
+
  // Empty titlebar for the dock widgets when "Lock Layout" has been activated.
 class DolphinDockTitleBar : public QWidget
 {
@@ -45,6 +53,7 @@ DolphinDockWidget::DolphinDockWidget(const QString& title, QWidget* parent, Qt::
     m_locked(false),
     m_dockTitleBar(0)
 {
+    setFeatures(DefaultDockWidgetFeatures);
 }
 
 DolphinDockWidget::DolphinDockWidget(QWidget* parent, Qt::WindowFlags flags) :
@@ -52,6 +61,7 @@ DolphinDockWidget::DolphinDockWidget(QWidget* parent, Qt::WindowFlags flags) :
     m_locked(false),
     m_dockTitleBar(0)
 {
+    setFeatures(DefaultDockWidgetFeatures);
 }
 
 DolphinDockWidget::~DolphinDockWidget()
@@ -71,9 +81,7 @@ void DolphinDockWidget::setLocked(bool lock)
             setFeatures(QDockWidget::NoDockWidgetFeatures);
         } else {
             setTitleBarWidget(0);
-            setFeatures(QDockWidget::DockWidgetMovable |
-                        QDockWidget::DockWidgetFloatable |
-                        QDockWidget::DockWidgetClosable);
+            setFeatures(DefaultDockWidgetFeatures);
         }
     }
 }