diff --git a/SimPEG/Inversion.py b/SimPEG/Inversion.py
index 696fdeaf..62772476 100644
--- a/SimPEG/Inversion.py
+++ b/SimPEG/Inversion.py
@@ -25,7 +25,7 @@ class BaseInversion(object):
     @directiveList.setter
     def directiveList(self, value):
         if type(value) is list:
-            value = Directives.DirectiveList(value)
+            value = Directives.DirectiveList(*value)
         assert isinstance(value, Directives.DirectiveList), 'Must be a DirectiveList'
         self._directiveList = value
         self._directiveList.inversion = self