diff --git a/src/calibre/gui2/layout.py b/src/calibre/gui2/layout.py
index e98817a02f..c01e708933 100644
--- a/src/calibre/gui2/layout.py
+++ b/src/calibre/gui2/layout.py
@@ -408,6 +408,7 @@ class ToolBar(BaseToolBar): # {{{
                     self.d_widget.layout().addWidget(self.donate_button)
                     if isosx:
                         self.d_widget.setStyleSheet('QWidget, QToolButton {background-color: none; border: none; }')
+                        self.d_widget.layout().addWidget(QLabel(u'\u00a0'))
                     bar.addWidget(self.d_widget)
                     self.showing_donate = True
                 elif what in self.gui.iactions: