Index: applications/editors/josm/plugins/wikipedia/src/org/wikipedia/gui/WikipediaToggleDialog.java
===================================================================
--- applications/editors/josm/plugins/wikipedia/src/org/wikipedia/gui/WikipediaToggleDialog.java	(revision 33016)
+++ applications/editors/josm/plugins/wikipedia/src/org/wikipedia/gui/WikipediaToggleDialog.java	(revision 33017)
@@ -71,5 +71,5 @@
                 @Override
                 public void mouseClicked(MouseEvent e) {
-                    if (e.getClickCount() == 2 && getSelectedValue() != null) {
+                    if (e.getClickCount() == 2 && getSelectedValue() != null && Main.getLayerManager().getEditDataSet() != null) {
                         final WikipediaEntry entry = getSelectedValue();
                         if (entry.coordinate != null) {