diff --git a/segeval/__init__.py b/segeval/__init__.py
index 76c43a4..356b239 100644
--- a/segeval/__init__.py
+++ b/segeval/__init__.py
@@ -66,7 +66,7 @@
 
 
 object_origins = {}
-for module, items in all_by_module.iteritems():
+for module, items in all_by_module.items():
     for item in items:
         object_origins[item] = module