diff --git a/weboob/backends/ina/backend.py b/weboob/backends/ina/backend.py
index 436114ea..8863b454 100644
--- a/weboob/backends/ina/backend.py
+++ b/weboob/backends/ina/backend.py
@@ -42,4 +42,4 @@ class InaBackend(BaseBackend, ICapVideo):
 
     def iter_search_results(self, pattern=None, sortby=ICapVideo.SEARCH_RELEVANCE, nsfw=False, required_fields=None):
         debug(u'backend ina: iter_search_results is not implemented')
-        return
+        return set()
diff --git a/weboob/backends/youjizz/backend.py b/weboob/backends/youjizz/backend.py
index 81b5e929..3253f48e 100644
--- a/weboob/backends/youjizz/backend.py
+++ b/weboob/backends/youjizz/backend.py
@@ -45,5 +45,4 @@ class YoujizzBackend(BaseBackend, ICapVideo):
     def iter_search_results(self, pattern=None, sortby=ICapVideo.SEARCH_RELEVANCE, nsfw=False, required_fields=None):
         if not nsfw:
             return
-        for video in self.browser.iter_search_results(pattern, required_fields=required_fields):
-            yield video
+        return self.browser.iter_search_results(pattern, required_fields=required_fields)