diff --git a/SimPEG/Inversion.py b/SimPEG/Inversion.py
index bae18bb6..696fdeaf 100644
--- a/SimPEG/Inversion.py
+++ b/SimPEG/Inversion.py
@@ -24,6 +24,8 @@ class BaseInversion(object):
 
     @directiveList.setter
     def directiveList(self, value):
+        if type(value) is list:
+            value = Directives.DirectiveList(value)
         assert isinstance(value, Directives.DirectiveList), 'Must be a DirectiveList'
         self._directiveList = value
         self._directiveList.inversion = self