src/java.desktop/macosx/classes/sun/lwawt/macosx/CPlatformView.java

*** 192,202 ****
          int absX = event.getAbsX();
          int absY = event.getAbsY();
  
          if (event.getType() == CocoaConstants.NSScrollWheel) {
              responder.handleScrollEvent(x, y, absX, absY, event.getModifierFlags(),
!                                         event.getScrollDeltaX(), event.getScrollDeltaY());
          } else {
              responder.handleMouseEvent(event.getType(), event.getModifierFlags(), event.getButtonNumber(),
                                         event.getClickCount(), x, y,
                                         absX, absY);
          }
--- 192,203 ----
          int absX = event.getAbsX();
          int absY = event.getAbsY();
  
          if (event.getType() == CocoaConstants.NSScrollWheel) {
              responder.handleScrollEvent(x, y, absX, absY, event.getModifierFlags(),
!                                         event.getScrollDeltaX(), event.getScrollDeltaY(),
!                                         event.getScrollMask());
          } else {
              responder.handleMouseEvent(event.getType(), event.getModifierFlags(), event.getButtonNumber(),
                                         event.getClickCount(), x, y,
                                         absX, absY);
          }