--- a/src/java.net.http/share/classes/jdk/internal/net/http/HttpRequestBuilderImpl.java	Fri Feb 16 16:09:14 2018 +0000
+++ b/src/java.net.http/share/classes/jdk/internal/net/http/HttpRequestBuilderImpl.java	Fri Feb 16 16:23:54 2018 +0000
@@ -38,7 +38,7 @@
 import static jdk.internal.net.http.common.Utils.isValidName;
 import static jdk.internal.net.http.common.Utils.isValidValue;
 
-public class HttpRequestBuilderImpl extends HttpRequest.Builder {
+public class HttpRequestBuilderImpl implements HttpRequest.Builder {
 
     private HttpHeadersImpl userHeaders;
     private URI uri;