Index: /applications/editors/josm/plugins/imagery/src/org/openstreetmap/josm/plugins/imagery/ImageryAdjustAction.java
===================================================================
--- /applications/editors/josm/plugins/imagery/src/org/openstreetmap/josm/plugins/imagery/ImageryAdjustAction.java	(revision 24504)
+++ /applications/editors/josm/plugins/imagery/src/org/openstreetmap/josm/plugins/imagery/ImageryAdjustAction.java	(revision 24505)
@@ -82,5 +82,5 @@
 
     @Override public void mouseDragged(MouseEvent e) {
-        if (adjustingLayer == null) return;
+        if (adjustingLayer == null || prevEastNorth == null) return;
         EastNorth eastNorth =
             Main.map.mapView.getEastNorth(e.getX(),e.getY());