--- a/src/java.net.http/share/classes/jdk/internal/net/http/HttpClientBuilderImpl.java	Fri Feb 16 16:09:14 2018 +0000
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/HttpClientBuilderImpl.java	Fri Feb 16 16:23:54 2018 +0000
@@ -35,7 +35,7 @@
 import jdk.internal.net.http.common.Utils;
 import static java.util.Objects.requireNonNull;
 
-public class HttpClientBuilderImpl extends HttpClient.Builder {
+public class HttpClientBuilderImpl implements HttpClient.Builder {
 
     CookieHandler cookieHandler;
     HttpClient.Redirect followRedirects;