Supplement Dated May 20, 2015

To the Statement of Additional Information for:

THE LINCOLN NATIONAL LIFE INSURANCE COMPANY

Lincoln Life Flexible Premium Variable Life Account M

Lincoln VULONE 2014

Effective May 1, 2015, the following replaces the sectioned titled “About the S&P 500 Index”:

About the S&P 500 Index. The S&P 500 Index (hereinafter "Index") is a product of S&P Dow Jones Indices LLC or its affiliates ("SPDJI"), and has been licensed for use by Lincoln Variable Insurance Products Trust and its affiliates (hereinafter "Licensee").  Standard & Poor’s® and S&P® are registered trademarks of Standard & Poor’s Financial Services LLC ("S&P") and Dow Jones® is a registered trademark of Dow Jones Trademark Holdings LLC ("Dow Jones").  The fund(s) are not sponsored, endorsed, sold or promoted by SPDJI, Dow Jones, S&P, or any of their respective affiliates (collectively, "S&P Dow Jones Indices").  S&P Dow Jones Indices do not make any representation or warranty, express or implied, to the owners of the funds or any member of the public regarding the advisability of investing in securities generally or in the funds particularly or the ability of the Index to track general market performance.  S&P Dow Jones Indices only relationship to Licensee with respect to the Index is the licensing of the Index and certain trademarks, service marks and/or trade names of S&P Dow Jones Indices and/or its licensors.  The Index is determined, composed and calculated by S&P Dow Jones Indices without regard to Licensee or the funds.  S&P Dow Jones Indices have no obligation to take the needs of Licensee or the owners of the funds into consideration in determining, composing or calculating the Index.  S&P Dow Jones Indices are not responsible for and have not participated in the determination of the prices, and amount of the funds or the timing of the issuance or sale of the funds or in the determination or calculation of the equation by which the funds are to be converted into cash, surrendered or redeemed, as the case may be.  S&P Dow Jones Indices have no obligation or liability in connection with the administration, marketing or trading of the funds. There is no assurance that investment products based on the Index will accurately track index performance or provide positive investment returns.  S&P Dow Jones Indices LLC is not an investment advisor.  Inclusion of a security within an index is not a recommendation by S&P Dow Jones Indices to buy, sell, or hold such security, nor is it considered to be investment advice.

S&P DOW JONES INDICES DO NOT GUARANTEE THE ADEQUACY, ACCURACY, TIMELINESS AND/OR THE COMPLETENESS OF THE INDEX OR ANY DATA RELATED THERETO OR ANY COMMUNICATION, INCLUDING BUT NOT LIMITED TO, ORAL OR WRITTEN COMMUNICATION (INCLUDING ELECTRONIC COMMUNICATIONS) WITH RESPECT THERETO.  S&P DOW JONES INDICES SHALL NOT BE SUBJECT TO ANY DAMAGES OR LIABILITY FOR ANY ERRORS, OMISSIONS, OR DELAYS THEREIN.  S&P DOW JONES INDICES MAKE NO EXPRESS OR IMPLIED WARRANTIES, AND EXPRESSLY DISCLAIMS ALL WARRANTIES, OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE OR AS TO RESULTS TO BE OBTAINED BY LICENSEE, OWNERS OF THE FUNDS, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE INDEX OR WITH RESPECT TO ANY DATA RELATED THERETO.  WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT WHATSOEVER SHALL S&P DOW JONES INDICES BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO, LOSS OF PROFITS, TRADING LOSSES, LOST TIME OR GOODWILL, EVEN IF THEY HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, WHETHER IN CONTRACT, TORT, STRICT LIABILITY, OR OTHERWISE.  THERE ARE NO THIRD PARTY BENEFICIARIES OF ANY AGREEMENTS OR ARRANGEMENTS BETWEEN S&P DOW JONES INDICES AND LICENSEE, OTHER THAN THE LICENSORS OF S&P DOW JONES INDICES.