src/java.httpclient/share/classes/java/net/http/PlainTunnelingConnection.java

@@ -109,11 +109,11 @@
     long write(ByteBuffer buffer) throws IOException {
         return delegate.write(buffer);
     }
 
     @Override
-    void close() {
+    public void close() {
         delegate.close();
         connected = false;
     }
 
     @Override