diff --git a/models/ModelBase.py b/models/ModelBase.py
index af31e7e..32cf0ca 100644
--- a/models/ModelBase.py
+++ b/models/ModelBase.py
@@ -279,7 +279,7 @@ class ModelBase(object):
 
     #overridable
     def get_converter(self):
-        raise NotImplementeError
+        raise NotImplementedError
         #return existing or your own converter which derived from base
 
     def get_target_iter(self):