diff --git a/webui.py b/webui.py
index 74c870a25e8525c09fef7f003b36e8cfc023b52b..b65b534b92af3027645d2f6bc010ce9d9bbbf77f 100644
--- a/webui.py
+++ b/webui.py
@@ -191,4 +191,4 @@ if __name__ == "__main__":
         run_pnginfo=run_pnginfo
     )
 
-    demo.launch(share=cmd_opts.share, server_name="0.0.0.0" if cmd_opts.listen else None, server_port=cmd_opts.port)
+    demo.launch(share=cmd_opts.share, server_name="0.0.0.0" if cmd_opts.listen else None, server_port=cmd_opts.port if cmd_opts.port else None)