diff --git a/mapper/object_mapper.py b/mapper/object_mapper.py
index 381a524..2ad874a 100644
--- a/mapper/object_mapper.py
+++ b/mapper/object_mapper.py
@@ -101,10 +101,10 @@ def create_map(self, type_from, type_to, mapping=None):
         :return: None
         """
 
-        if (type(type_from) is not type):
+        if (not isinstance(type_from, type)):
             raise ObjectMapperException("type_from must be a type")
 
-        if (type(type_to) is not type):
+        if (not isinstance(type_to, type)):
             raise ObjectMapperException("type_to must be a type")
 
         if (mapping is not None and not isinstance(mapping, dict)):