--- a/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/HttpClientImpl.java	Mon Dec 11 16:43:11 2017 +0000
+++ b/src/jdk.incubator.httpclient/share/classes/jdk/incubator/http/HttpClientImpl.java	Thu Dec 14 12:28:32 2017 +0000
@@ -1038,7 +1038,7 @@
     // used for the connection window
     int getReceiveBufferSize() {
         return Utils.getIntegerNetProperty(
-                "jdk.httpclient.connectionWindowSize", 256 * 1024
+                "jdk.httpclient.receiveBufferSize", 2 * 1024 * 1024
         );
     }
 }