diff --git a/web/utils/site.py b/web/utils/site.py
index 36e08e508..ff4213474 100644
--- a/web/utils/site.py
+++ b/web/utils/site.py
@@ -559,7 +559,7 @@ class sites(object):
             http_ssl = http_ssl + "\n\thttp2 on;"
 
             if mw.isSupportHttp3(version):
-                http_ssl = "\n\tlisten 443 ssl reuseport;"
+                http_ssl = http_ssl + "\n\tlisten 443 ssl reuseport;"
                 http_ssl = http_ssl + "\n\thttp3 on;"
 
             conf = conf.replace(listen, listen + http_ssl)