Index: /applications/editors/josm/plugins/slippymap/slippymap/SlippyMapLayer.java
===================================================================
--- /applications/editors/josm/plugins/slippymap/slippymap/SlippyMapLayer.java	(revision 4079)
+++ /applications/editors/josm/plugins/slippymap/slippymap/SlippyMapLayer.java	(revision 4080)
@@ -114,5 +114,5 @@
 				});
 
-				Main.map.mapView.addLayerChangeListener(new LayerChangeListener(){
+				Main.map.mapView.addLayerChangeListener(new MapView.LayerChangeListener(){
 					public void activeLayerChange(Layer oldLayer, Layer newLayer) {}
 					public void layerAdded(Layer newLayer) {}