Index: src/main/java/common/javax/swing/plaf/basic/BasicMenuUI.java =================================================================== --- src/main/java/common/javax/swing/plaf/basic/BasicMenuUI.java (revision 496381) +++ src/main/java/common/javax/swing/plaf/basic/BasicMenuUI.java (working copy) @@ -247,7 +247,7 @@ } public Dimension getMaximumSize(final JComponent c) { - if (!((JMenu)c).isTopLevelMenu()) { + if (!((JMenu) menuItem).isTopLevelMenu()) { return super.getMaximumSize(c); } Dimension result = c.getPreferredSize();