diff --git a/src/calibre/gui2/store/virtualo_plugin.py b/src/calibre/gui2/store/virtualo_plugin.py
index d86aa3e0e5..c6d6fc70d8 100644
--- a/src/calibre/gui2/store/virtualo_plugin.py
+++ b/src/calibre/gui2/store/virtualo_plugin.py
@@ -25,12 +25,11 @@ class VirtualoStore(BasicStoreConfig, StorePlugin):
 
     def open(self, parent=None, detail_item=None, external=False):
         url = 'http://virtualo.pl/ebook/c2/'
-        detail_url = None
 
         if external or self.config.get('open_external', False):
             open_url(QUrl(url_slash_cleaner(detail_item if detail_item else url)))
         else:
-            d = WebStoreDialog(self.gui, url, parent, detail_url)
+            d = WebStoreDialog(self.gui, url, parent, detail_item)
             d.setWindowTitle(self.name)
             d.set_tags(self.config.get('tags', ''))
             d.exec_()