Western Asset Mortgage Defined Opportunity Fund Inc. (“DMO”) Announces Distributions for the Month of December 2014

Western Asset Mortgage Defined Opportunity Fund Inc. (NYSE:DMO) announced today a distribution from short-term capital gains of $0.0528 and a distribution from long-term capital gains of $1.1633 per common share for December 2014. These capital gain distributions are in addition to the previously declared income distribution of $0.1600 per common share payable December 26, 2014 to shareholders of record as of December 19, 2014.

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 2015, 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.

For more information about the Fund, please call 1-888-777-0102 or consult the Fund’s web site at www.lmcef.com. Hard copies of the Fund’s complete audited financial statements are available free of charge upon request.

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.