diff --git a/src/calibre/gui2/lrf_renderer/main.py b/src/calibre/gui2/lrf_renderer/main.py
index 0b746777bf..f080022415 100644
--- a/src/calibre/gui2/lrf_renderer/main.py
+++ b/src/calibre/gui2/lrf_renderer/main.py
@@ -314,6 +314,8 @@ def main(args=sys.argv, logger=None):
         sys.excepthook = main.unhandled_exception
         main.show()
         main.render()
+        main.activateWindow()
+        main.raise_()
         return app.exec_()        
     return 0