Index: applications/editors/josm/plugins/wikipedia/src/org/wikipedia/WikipediaApp.java
===================================================================
--- applications/editors/josm/plugins/wikipedia/src/org/wikipedia/WikipediaApp.java	(revision 30100)
+++ applications/editors/josm/plugins/wikipedia/src/org/wikipedia/WikipediaApp.java	(revision 30125)
@@ -199,9 +199,9 @@
             url = decodeURL(url);
             // extract Wikipedia language and
-            final Matcher m = Pattern.compile("https?://(\\w*)\\.wikipedia\\.org/wiki/(.*)").matcher(url);
+            final Matcher m = Pattern.compile("(https?:)?//(\\w*)\\.wikipedia\\.org/wiki/(.*)").matcher(url);
             if (!m.matches()) {
                 return null;
             }
-            return new WikipediaLangArticle(m.group(1), m.group(2));
+            return new WikipediaLangArticle(m.group(2), m.group(3));
         }