diff --git a/gin1.7.go b/gin1.7.go
index 59de3d0b..919c80f3 100644
--- a/gin1.7.go
+++ b/gin1.7.go
@@ -28,7 +28,7 @@ func (engine *Engine) RunAutoTLS(domain ...string) (err error) {
 	}
 
 	s := &http.Server{
-		Addr:      ":443",
+		Addr:      ":https",
 		TLSConfig: &tls.Config{GetCertificate: AutoTLSManager.GetCertificate},
 		Handler:   engine,
 	}