Index: /trunk/src/org/openstreetmap/josm/gui/dialogs/layer/LayerVisibilityAction.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/dialogs/layer/LayerVisibilityAction.java	(revision 17752)
+++ /trunk/src/org/openstreetmap/josm/gui/dialogs/layer/LayerVisibilityAction.java	(revision 17753)
@@ -227,5 +227,5 @@
      * @author Michael Zangl
      */
-    private abstract class AbstractFilterSlider extends JPanel implements LayerVisibilityMenuEntry {
+    private static abstract class AbstractFilterSlider extends JPanel implements LayerVisibilityMenuEntry {
         private final double minValue;
         private final double maxValue;