Addendum to Distribution Agreement dated December 5, 2001 Calvert Distributors, Inc. Addendum to Schedule II

Addendum to Distribution Agreement dated December 5, 2001
Xxxxxxx Distributors, Inc.

Addendum to Schedule II

Fees are expressed as a percentage of average annual daily net assets and are payable monthly.

Distribution Fee

Xxxxxxx Social Investment Fund
         CSIF Equity
         CSIF Bond

Class Y

N/A

Xxxxxxx World Values Fund, Inc.
         CWVF International Equity Fund
         Xxxxxxx International Opportunities Fund

Class Y

N/A

Xxxxxxx Impact Fund, Inc.
         Xxxxxxx Large Cap Growth Fund

Class Y

N/A

Schedule III

Fees are expressed as a percentage of average annual daily net assets and are payable monthly.

Service Fee

Xxxxxxx Social Investment Fund
         CSIF Equity
         CSIF Bond

Class Y

N/A

Xxxxxxx World Values Fund, Inc.
         CWVF International Equity Fund
         Xxxxxxx International Opportunities Fund

Class Y

N/A

Xxxxxxx Impact Fund, Inc.
         Xxxxxxx Large Cap Growth Fund

Class Y

N/A

Date: October 31, 2008