diff --git a/gramps/gui/plug/report/_reportdialog.py b/gramps/gui/plug/report/_reportdialog.py
index e1d5c54a5..29a7e3002 100644
--- a/gramps/gui/plug/report/_reportdialog.py
+++ b/gramps/gui/plug/report/_reportdialog.py
@@ -163,7 +163,7 @@ class ReportDialog(ManagedWindow):
         self.ok = self.window.add_button(_('_OK'), Gtk.ResponseType.OK)
         self.ok.connect('clicked', self.on_ok_clicked)
 
-        self.window.set_position(Gtk.WindowPosition.CENTER)
+        self.window.set_position(Gtk.WindowPosition.CENTER_ON_PARENT)
         self.window.set_default_size(600, -1)
 
         # Set up and run the dialog.  These calls are not in top down