diff --git a/jetty-server/src/main/java/org/eclipse/jetty/server/ForwardedRequestCustomizer.java b/jetty-server/src/main/java/org/eclipse/jetty/server/ForwardedRequestCustomizer.java
index dac5c33f0c4d..9f34c4066645 100644
--- a/jetty-server/src/main/java/org/eclipse/jetty/server/ForwardedRequestCustomizer.java
+++ b/jetty-server/src/main/java/org/eclipse/jetty/server/ForwardedRequestCustomizer.java
@@ -880,7 +880,7 @@ else if ("off".equalsIgnoreCase(field.getValue()) || "false".equalsIgnoreCase(fi
             {
                 _secure = false;
                 updateProto(HttpScheme.HTTP.asString(), Source.XPROXIED_HTTPS);
-                updatePort(80, Source.XPROXIED_HTTPS);
+                updatePort(MutableHostPort.IMPLIED, Source.XPROXIED_HTTPS);
             }
             else
             {