diff --git a/multiselectfield/db/fields.py b/multiselectfield/db/fields.py
index 1bb24ea..876638c 100644
--- a/multiselectfield/db/fields.py
+++ b/multiselectfield/db/fields.py
@@ -34,6 +34,7 @@ else:
 
 # Code from six egg https://bitbucket.org/gutworth/six/src/a3641cb211cc360848f1e2dd92e9ae6cd1de55dd/six.py?at=default
 
+
 def add_metaclass(metaclass):
     """Class decorator for creating a class with a metaclass."""
     def wrapper(cls):
@@ -48,8 +49,13 @@ def add_metaclass(metaclass):
 
 @python_2_unicode_compatible
 class MSFList(list):
+
+    def __init__(self, choices, *args, **kwargs):
+        self.choices = choices
+        super(MSFList, self).__init__(*args, **kwargs)
+
     def __str__(msgl):
-        l = [choices.get(int(i)) if i.isdigit() else choices.get(i) for i in msgl]
+        l = [msgl.choices.get(int(i)) if i.isdigit() else msgl.choices.get(i) for i in msgl]
         return u', '.join([string_type(s) for s in l])