Securities and Exchange Commission
                            Washington, D. C. 20549

                                  Schedule 13G
                    Under the Securities Exchange Act of 1934
                                (Amendment No. 2)

                            Research In Motion Limited
                                  Common Stock
                              CUSIP Number 760975102

Date of Event Which Requires Filing of this Statement:     December 31, 2003

CUSIP No. 760975102

         1)     Name of reporting person:
                  Legg Mason, Inc.
                Tax Identification No.:
                  52-1200960

         2)     Check the appropriate box if a member of a group:
                  a)     n/a
                  b)     n/a

         3)     SEC use only

         4)     Place of organization:
                  Maryland

Number of shares beneficially owned by each reporting person with:  *

         *  Beneficial ownership of the issuer's securities is no longer
         attributed to Legg Mason, Inc. as parent company.

         No subsidiary, or group of subsidiaries, affiliated with Legg Mason,
         Inc. currently has beneficial ownership of 5% or more of the issuer's
         securities. Holdings as of December 31, 2003 for the subsidiaries that
         were previously identified in prior Schedules 13G filed with respect
         to the issuer are included in the Form 13F filed by Legg Mason, Inc.
         of even date herewith. See Item 4) for more details.

         5)   Sole voting power:          - 0 -
         6)   Shared voting power         - 0 -
         7    Sole dispositive power:     - 0 -
         8)   Shared dispositive power:   - 0 -

         9)   Aggregate amount beneficially owned by each reporting person:
                  - 0 -

         10)  Check if the aggregate amount in row (9) excludes certain shares:
                  n/a

         11)   Percent of class represented by amount in row (9):
                  0%

         12)   Type of reporting person:
                  HC, CO
           ______________________________________________________________

         Item 1a)     Name of issuer:
                           Research In Motion Limited

         Item 1b)     Address of issuer's principal executive offices:
                           295 Phillips Street
                           Waterloo, Ontario N2L3W8, Canada

         Item 2a)    Name of person filing:
                           Legg Mason, Inc.

         Item 2b)    Address of  principal business office:
                           100 Light Street
                           Baltimore, MD  21202

         Item 2c)    Citizenship:
                           Maryland Corporation

         Item 2d)    Title of class of securities:
                           Common Stock

         Item 2e)    CUSIP number:     760975102

         Item 3)     If this statement is filed pursuant to Rule 13d-1(b),
                           or 13d-2(b), check whether the person filing is a:
         (a)    [   ]    Broker or dealer under Section 15 of the Act.
         (b)    [   ]    Bank as defined in Section 3(a) (6) of the Act.
         (c)    [   ]    Insurance Company as defined in Section 3(a) (6) of
                                the Act.
         (d)    [   ]    Investment Company registered under Section 8 of the
                                Investment Company Act.
         (e)    [   ]    Investment Adviser registered under Section 203 of the
                                Investment Advisers Act of 1940.
         (f)    [   ]    Employee Benefit Plan, Pension Fund which is subject
                                to ERISA of 1974 or Endowment Fund; see
                                240.13d-1(b)(ii)(F).
         (g)    [ X ]    Parent holding company, in accordance with
                                240.13d-1(b)(ii)(G).
         (h)    [   ]    Group, in accordance with 240.13d-1(b)(1)(ii)(H).

         Item 4)    Ownership:

         (a)     Amount beneficially owned:      - 0 -  *

          *  In accordance with Exchange Act Release No. 39538, the investment
          adviser subsidiaries of Legg Mason, Inc. have established
          informational barriers and therefore beneficial ownership of the
          issuer's securities is no longer attributed to Legg Mason, Inc. as
          parent company.

          No subsidiary, or group of subsidiaries, affiliated with Legg Mason,
          Inc. currently has beneficial ownership of 5% or more of the issuer's
          securities. Holdings as of December 31, 2003 for the subsidiaries that
          were previously identified in prior Schedules 13G filed with respect
          to the issuer are included in the Form 13F filed by Legg Mason, Inc.
          of even date herewith.

         (b)     Percent of Class:  0%

         (c)     Number of shares as to which such person has:
                  (i)   sole power to vote or to direct the vote:
                                    - 0 -
                  (ii)  shared power to vote or to direct the vote:
                                    - 0 -
                  (iii) sole power to dispose or to direct the disposition of:
                                    - 0 -
                  (iv) shared power to dispose or to direct the disposition of:
                                    - 0 -

         Item 5)    Ownership of Five Percent or less of a class:
                           n/a

         Item 6)    Ownership of more than Five Percent on behalf of another
                                person:
                           n/a

         Item 7)    Identification and classification of the subsidiary which
                        acquired the security being reported on by the parent
                        holding company:
                          n/a

         Item 8)    Identification and classification of members of the group:
                           n/a

         Item 9)    Notice of dissolution of group:
                           n/a

         Item 10)   Certification:

                           By signing below I certify that, to the best of my
         knowledge and belief, the securities referred to above were acquired
         and are held in the ordinary course of business and were not acquired
         and are not held for the purpose of or with the effect of changing or
         influencing the control of the issuer of the securities and were not
         acquired and are not held in connection with or as a participant in
         any transaction having that purpose or effect.

                                     Signature
                                    -----------

                           After reasonable inquiry and to the best of my
         knowledge and belief, I certify that the information set forth in this
         statement is true, complete and correct.

         -------------------------------
         Date - February 13, 2004

         Legg Mason, Inc.


         By ___________________________________________
              Peter L. Bain, Executive Vice President