CORRECTING and REPLACING Western Asset Mortgage Defined Opportunity Fund Inc. (“DMO”) Announces Distributions for the Month of December 2013

In tabular information of release dated December 16, 2013, Long-Term Capital Gain Record Date should read 12/31/2013 (sted 12/27/2013)

The corrected release reads:

WESTERN ASSET MORTGAGE DEFINED OPPORTUNITY FUND INC. (“DMO”) ANNOUNCES DISTRIBUTIONS FOR THE MONTH OF DECEMBER 2013

Western Asset Mortgage Defined Opportunity Fund Inc. (NYSE:DMO) announced today a distribution from income of $0.1225, a distribution from short-term capital gains of $0.1591, and a distribution from long-term capital gains of $0.4803 per common share for December 2013. These income and capital gain distributions are in addition to the previously declared income distribution of $0.1500 per common share payable December 27, 2013 to shareholders of record as of December 20, 2013.

The distribution schedule appears below:

This press release is not for tax reporting purposes but is being provided to announce the amount of the Fund’s distributions that have been declared by the Board of Directors. In early 2014, after definitive information is available, the Fund will send shareholders a Form 1099-DIV, if applicable, specifying how the distributions paid by the Fund during the prior calendar year should be characterized for purposes of reporting the distributions on a shareholder’s tax return (e.g., ordinary income, long-term capital gain or return of capital).

Western Asset Mortgage Defined Opportunity Fund Inc., a non-diversified, limited-term, closed-end management investment company, is managed by Legg Mason Partners Fund Advisor, LLC, a wholly-owned subsidiary of Legg Mason, Inc. and is sub-advised by Western Asset Management Company, an affiliate of the investment manager.

Contact the Fund at 1-888-777-0102 for additional information, or consult the Fund’s web site at www.lmcef.com.

Data and commentary provided in this press release are for informational purposes only. Legg Mason and its affiliates do not engage in selling shares of the Fund.