diff -r 58ad02eb44c3 -r f103e0c2be1e src/java.base/share/classes/sun/security/ssl/ECDHKeyExchange.java
--- a/src/java.base/share/classes/sun/security/ssl/ECDHKeyExchange.java	Wed May 23 11:55:41 2018 -0700
+++ b/src/java.base/share/classes/sun/security/ssl/ECDHKeyExchange.java	Thu May 24 09:21:01 2018 -0700
@@ -435,7 +435,7 @@
                                 context.negotiatedProtocol);
                 SSLKeyDerivation kd = mskd.createKeyDerivation(
                         context, preMasterSecret);
-                return kd.deriveKey("TODO", params);
+                return kd.deriveKey("MasterSecret", params);
             } catch (GeneralSecurityException gse) {
                 throw (SSLHandshakeException) new SSLHandshakeException(
                     "Could not generate secret").initCause(gse);