@@ -309,10 +309,11 @@ class ResultContainer:
309309
310310 for res in results:
311311 # FIXME : handle more than one category per engine
312− res['category'] = engines[res['engine']].categories[0]
312+ engine = engines[res['engine']]
313+ res['category'] = engine.categories[0] if len(engine.categories) > 0 else ''
313314
314315 # FIXME : handle more than one category per engine
315− category = engines[res['engine']].categories[0]\
316+ category = res['category']\
316317 + ':' + res.get('template', '')\
317318 + ':' + ('img_src' if 'img_src' in res or 'thumbnail' in res else '')
318319