--- old/src/java.desktop/macosx/classes/com/apple/laf/AquaMenuBarBorder.java	2017-10-31 08:57:36.371481749 -0700
+++ new/src/java.desktop/macosx/classes/com/apple/laf/AquaMenuBarBorder.java	2017-10-31 08:57:36.219481755 -0700
@@ -31,13 +31,14 @@
 import java.awt.Insets;
 
 import javax.swing.border.Border;
+import javax.swing.plaf.UIResource;
 
 import sun.swing.SwingUtilities2;
 
 /**
  * The class represents the border of a {@code JMenuBar}.
  */
-public class AquaMenuBarBorder implements Border {
+public class AquaMenuBarBorder implements Border, UIResource {
 
     @Override
     public void paintBorder(final Component c, final Graphics g, final int x,