diff --git a/gateway/reverse_proxy.go b/gateway/reverse_proxy.go
index a4bfc27b8e7..468e0ffb096 100644
--- a/gateway/reverse_proxy.go
+++ b/gateway/reverse_proxy.go
@@ -1381,7 +1381,7 @@ func (p *ReverseProxy) WrappedServeHTTP(rw http.ResponseWriter, req *http.Reques
 
 	upgrade, _ := p.IsUpgrade(req)
 	// Deal with 101 Switching Protocols responses: (WebSocket, h2c, etc)
-	if upgrade {
+	if upgrade && res.StatusCode == 101 {
 		if err := p.handleUpgradeResponse(rw, outreq, res); err != nil {
 			p.ErrorHandler.HandleError(rw, logreq, err.Error(), http.StatusInternalServerError, true)
 			return ProxyResponse{UpstreamLatency: upstreamLatency}