diff --git a/aqt/browser.py b/aqt/browser.py
index ffd55dc4d..26ce95ff6 100644
--- a/aqt/browser.py
+++ b/aqt/browser.py
@@ -793,6 +793,7 @@ by clicking on one on the left."""))
         p.setColor(QPalette.Base, p.window().color())
         self.sidebarTree.setPalette(p)
         self.sidebarDockWidget.setVisible(False)
+        self.sidebarDockWidget.setFloating(False)
         self.sidebarDockWidget.visibilityChanged.connect(self.onSidebarVisChanged)
         self.addDockWidget(Qt.LeftDockWidgetArea, dw)