diff --git a/lib/core/decorators.py b/lib/core/decorators.py
index f06185628..1f5c31e13 100755
--- a/lib/core/decorators.py
+++ b/lib/core/decorators.py
@@ -33,7 +33,7 @@ def with_caching(*args, **kwargs):
             key = id(func)
             for arg in args:
                 key += id(arg)
-            for k, v in kwargs:
+            for k, v in kwargs.items():
                 key += id(k) + id(v)
 
             # If it was cached and the cache timeout hasn't been reached