DELAWARE GROUP® ADVISER FUNDS

Delaware International Bond Fund

(the “Fund”)

Supplement to the Fund’s Class A, Class C, Class R, and Institutional Class

Summary Prospectuses dated July 15, 2011

(as amended and restated August 4, 2011)

The following replaces the information in the section entitled “Who manages the Fund? – Investment manager”:

Who manages the Fund?

Investment manager

Delaware Management Company

Portfolio manager	Title with Delaware Management Company	Start date on the Fund
Paul Grillo, CFA	Senior Vice President, Co-Chief Investment Officer – Total Return Fixed Income Strategy	July 2011
Graham McDevitt	Global Strategist and Senior Portfolio Manager	July 2011

Investments in the Fund are not and will not be deposits with or liabilities of Macquarie Bank Limited ABN 46 008 583 542 and its holding companies, including their subsidiaries or related companies (the "Macquarie Group"), and are subject to investment risk, including possible delays in repayment and loss of income and capital invested. No Macquarie Group company guarantees or will guarantee the performance of the Fund, the repayment of capital from the Fund, or any particular rate of return.

Please keep this Supplement for future reference.

This Supplement is dated August 16, 2011.