SharePoint 2010 Custom Workflow Actions in SharePoint 2013

After upgrading the error comes up that the action can not load the class.  

Error:  Could not deserialize object. The type 'MyCustom.WorkflowActions.StartAworkflowOnAnotherList' could not be resolved.

Before in 2010:

<System.Workflow.ComponentModel.WorkflowCompiler>
    <authorizedTypes>
          <authorizedType .....>

In SharePoint 2013 after the upgrade which causes this break:

<System.Workflow.ComponentModel.WorkflowCompiler>
    <authorizedTypes>
      <targetFx version="v4.0">
      </targetFx>
       <authorizedType Assembly="MyCustom.WorkflowActions.StartAworkflowOnAnotherList.....>


To fix:

<System.Workflow.ComponentModel.WorkflowCompiler>
    <authorizedTypes>
      <targetFx version="v4.0">
            <authorizedType Assembly="MyCustom.WorkflowActions.StartAworkflowOnAnotherList.....>
      </targetFx>