--- old/src/share/classes/java/util/function/LongBinaryOperator.java	2012-11-26 17:53:06.575300233 -0800
+++ new/src/share/classes/java/util/function/LongBinaryOperator.java	2012-11-26 17:53:06.363300222 -0800
@@ -29,7 +29,10 @@
  *
  * @since 1.8
  */
-public interface LongBinaryOperator {
+public interface LongBinaryOperator extends BinaryOperator<Long> {
+
+    @Override
+    public default Long operate(Long left, Long right) { return operateAsLong((long) left, (long) right); }
 
     /**
      * Returns the {@code long} result of the operation upon the {@code long}