diff --git a/sickbeard/providers/generic.py b/sickbeard/providers/generic.py
index 59b1decb..ec13997f 100644
--- a/sickbeard/providers/generic.py
+++ b/sickbeard/providers/generic.py
@@ -207,7 +207,7 @@ class GenericProvider:
         results = {}
 
         for ep in episode:
-            results += self.cache.findNeededEpisodes(ep)
+            results.update(self.cache.findNeededEpisodes(ep))
 
         return results