Oppenheimer INTERNATIONAL BOND FUND

Supplement dated June 4, 2012 to the

Prospectus and Statement of Additional Information dated January 27, 2012

As a result of a shareholder meeting of Oppenheimer International Bond Fund (the “Fund”) held on February 29, 2012 at which certain proposals described in the Fund’s proxy statement dated December 16, 2011 were approved, this supplement amends the Fund’s Prospectus and Statement of Additional Information, each dated January 27, 2012, and is in addition to any other supplements:

1.      The section of the Prospectus titled “Concentration” is replaced in its entirety by the following:

Concentration. The Fund will not concentrate in the securities of any one foreign government or in the debt and equity securities of companies in any one foreign country or in any one industry. At times, however, the Fund may emphasize investments in some industries more than others. The Securities and Exchange Commission has taken the position that investment of more than 25% of a fund's total assets in issuers in the same industry constitutes concentration in that industry. That limit does not apply to securities issued or guaranteed by the U.S. government or its agencies and instrumentalities or securities issued by investment companies; however, securities issued by any one foreign government are considered to be part of a single "industry."

2.      The section of the Statement of Additional Information titled “Investment Restrictions” is replaced in its entirety by the following:

Investment Restrictions

Fundamental Policies. The Fund has adopted policies and restrictions to govern its investments. Under the Investment Company Act, fundamental policies are those policies that can be changed only by the vote of a "majority" of the Fund's outstanding voting securities, which is defined as the vote of the holders of the lesser of:

·      67% or more of the shares present or represented by proxy at a shareholder meeting, if the holders of more than 50% of the outstanding shares are present or represented by proxy; or

·      more than 50% of the outstanding shares.

Policies and restrictions described in the Prospectus or this SAI are "fundamental" only if they are identified as such. The Fund's Board of Trustees can change non-fundamental policies and restrictions without shareholder approval. However, significant changes to investment policies and restrictions will be described in supplements or updates to the Prospectus or this SAI, as appropriate.  The Fund's most significant investment policies are described in the Prospectus.

Other Fundamental Investment Restrictions. The following investment restrictions are fundamental policies of the Fund.

·      The Fund may not borrow money, except to the extent permitted under the Investment Company Act, the rules or regulations thereunder or any exemption therefrom that is applicable to the Fund, as such statute, rules, regulations or exemptions may be amended or interpreted from time to time by the Securities & Exchange Commission, its staff, or other authority with appropriate jurisdiction.

·      The Fund may not make any investment if, as a result, the Fund’s investments will be concentrated in any one industry, except to the extent permitted under the Investment Company Act, the rules or regulations thereunder or any exemption therefrom that is applicable to the Fund, as such statute, rules, regulations or exemption may be amended or interpreted from time to time by the Securities & Exchange Commission, its staff, or other authority with appropriate jurisdiction. For purposes of this concentration limitation, the Fund’s investment adviser may analyze the characteristics of a particular issuer and instrument and may assign an industry or sector classification consistent with those characteristics in the event that any third party classification provider that may be used by the investment adviser does not assign a classification.

·      The Fund cannot make loans, except to the extent permitted under the Investment Company Act, the rules or regulations thereunder or any exemption therefrom that is applicable to the Fund, as such statute, rules, regulations or exemption may be amended or interpreted from time to time by the Securities & Exchange Commission, its staff, or other authority with appropriate jurisdiction.

·      The Fund cannot invest in real estate or commodities, except to the extent permitted under the Investment Company Act, the rules or regulations thereunder or any exemption therefrom that is applicable to the Fund, as such statute, rules, regulations or exemption may be amended or interpreted from time to time by the Securities & Exchange Commission, its staff, or other authority with appropriate jurisdiction.

·      The Fund cannot issue “senior securities,” except to the extent permitted under the Investment Company Act, the rules or regulations thereunder or any exemption therefrom that is applicable to the Fund, as such statute, rules, regulations or exemption may be amended or interpreted from time to time by the Securities & Exchange Commission, its staff, or other authority with appropriate jurisdiction.

·      The Fund cannot underwrite securities of other issuers, except to the extent permitted under the Investment Company Act or the Securities Act of 1933, the rules or regulations thereunder or any exemption therefrom that is applicable to the Fund, as such statutes, rules, regulations or exemption may be amended or interpreted from time to time by the Securities & Exchange Commission, its staff, or other authority with appropriate jurisdiction.

The following is only a brief summary of certain current limitations imposed on investment companies by the Investment Company Act and certain rules and interpretations thereunder, and is not a complete description of such limits. The discussion below is based on current law, regulations and administrative interpretations. Those laws, regulations and administrative interpretations may be changed by legislative, judicial, or administrative action, sometimes with retroactive effect.

The Investment Company Act prohibits a fund from issuing "senior securities," which are generally defined as fund obligations that have a priority over the fund's shares with respect to the payment of dividends or the distribution of fund assets, except that the fund may borrow money as described above.
Currently, under the Investment Company Act, and an Oppenheimer funds' exemptive order, a fund may borrow only from banks and/or affiliated investment companies in an amount up to one-third of its total assets (including the amount borrowed less all liabilities and indebtedness other than borrowing), except that a fund may borrow up to 5% of its total assets from any person for temporary purposes. Under the Investment Company Act, there is a rebuttable presumption that a loan is temporary if it is repaid within 60 days and not extended or renewed.

Under the Investment Company Act a fund currently cannot make any commitment as an underwriter, if immediately thereafter the amount of its outstanding underwriting commitments, plus the value of its investments in securities of issuers (other than investment companies) of which it owns more than ten percent of the outstanding voting securities, exceeds twenty-five percent of the value of the fund's total assets, except to the extent that a fund may be considered an underwriter within the meaning of the Securities Act when reselling securities held in its own portfolio.
The Investment Company Act does not prohibit a fund from owning real estate, commodities or contracts related to commodities. The extent to which the Fund can invest in real estate and/or commodities or contracts related to commodities is set out in the investment strategies described in the Prospectus and this SAI.

Current SEC staff interpretations under the Investment Company Act prohibit a fund from lending more than one-third of its total assets, except through the purchase of debt obligations or the use of repurchase agreements.
The Investment Company Act does not define what constitutes "concentration" in an industry. However the SEC has taken the position that investment of more than 25% of a fund's total assets in issuers in the same industry constitutes concentration in that industry. That limit does not apply to securities issued or guaranteed by the U.S. government or its agencies and instrumentalities or securities issued by investment companies; however, securities issued by any one foreign government are considered to be part of a single "industry."

Unless the Prospectus or this SAI states that a percentage restriction applies on an ongoing basis, it applies only at the time the Fund makes an investment. That means the Fund is not required to sell securities to meet the percentage limits if the value of the investment increases in proportion to the size of the Fund. Percentage limits on borrowing and investments in illiquid securities apply on an ongoing basis.

For purposes of the Fund's policy not to concentrate its investments, described above, the Fund has adopted an industry classification that is not a fundamental policy.
 

Non-Fundamental Restrictions. The Fund has the following additional operating policies that are not "fundamental" and can be changed by the Board without shareholder approval.

The Fund cannot invest in the securities of other registered investment companies or registered unit investment trusts in reliance on sub-paragraph (F) or (G) of Section 12(d)(1) of the Investment Company Act.

June 4, 2012                                                                                                                                         PS0880.039