UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                               (Amendment No. 1)*

                    Under the Securities Exchange Act of 1934


                                   IHOP Corp.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, par value $0.01 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   449623-10-7
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                                December 31, 2003
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:                                                    [ ] Rule 13d-1(b)
                                                             [X] Rule 13d-1(c)
                                                             [ ] Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

            Person Authorized to Receive Notices and Communications:


                             Janice V. Sharry, Esq.
                              Haynes and Boone, LLP
                           901 Main Street, Suite 3100
                               Dallas, Texas 75202
                                 (214) 651-5562






                                  SCHEDULE 13G

CUSIP No. - 449623-10-7                                        Page 2 of 7 Pages

--------------------------------------------------------------------------------
      1 NAME OF REPORTING PERSON
        I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)

                  MSD Capital, L.P., a Delaware limited partnership
                  74-2880190
--------------------------------------------------------------------------------
      2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                (a) [ ]
                                                                        (b) [X]

--------------------------------------------------------------------------------
      3 SEC USE ONLY

--------------------------------------------------------------------------------
      4 CITIZENSHIP OR PLACE OF ORGANIZATION

                       Delaware
--------------------------------------------------------------------------------
                     5      SOLE VOTING POWER
    NUMBER OF
      SHARES                         0
   BENEFICIALLY      -----------------------------------------------------------
     OWNED BY        6      SHARED VOTING POWER
       EACH
    REPORTING                        2,100,100
      PERSON         -----------------------------------------------------------
       WITH          7      SOLE DISPOSITIVE POWER

                                     0
                     -----------------------------------------------------------
                     8      SHARED DISPOSITIVE POWER

                                    2,100,100
--------------------------------------------------------------------------------
      9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                            2,100,100
--------------------------------------------------------------------------------
     10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]


--------------------------------------------------------------------------------
     11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                            9.9%
--------------------------------------------------------------------------------
     12 TYPE OF REPORTING PERSON

                            PN
--------------------------------------------------------------------------------







                                  SCHEDULE 13G

CUSIP No. - 449623-10-7                                        Page 3 of 7 Pages

--------------------------------------------------------------------------------
      1 NAME OF REPORTING PERSON
        I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)

               MSD SBI, L.P., a Delaware limited partnership
               61-1420251
--------------------------------------------------------------------------------
      2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                (a) [ ]
                                                                        (b) [X]

--------------------------------------------------------------------------------
      3 SEC USE ONLY

--------------------------------------------------------------------------------
      4 CITIZENSHIP OR PLACE OF ORGANIZATION

                     Delaware
--------------------------------------------------------------------------------
                      5      SOLE VOTING POWER
     NUMBER OF
       SHARES                     0
    BENEFICIALLY      ----------------------------------------------------------
      OWNED BY        6      SHARED VOTING POWER
        EACH
     REPORTING                    2,100,100
       PERSON         ----------------------------------------------------------
        WITH          7      SOLE DISPOSITIVE POWER

                                  0
                      ----------------------------------------------------------
                      8      SHARED DISPOSITIVE POWER

                                  2,100,100
--------------------------------------------------------------------------------
      9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      2,100,100
--------------------------------------------------------------------------------
     10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]


--------------------------------------------------------------------------------
     11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                      9.9%
--------------------------------------------------------------------------------
     12 TYPE OF REPORTING PERSON

                      PN
--------------------------------------------------------------------------------






CUSIP No. - 449623-10-7                                        Page 4 of 7 Pages


Item 1(a)         Name of Issuer:

                  IHOP Corp.

Item 1(b)         Address of Issuer's Principal Executive Offices:

                  450 North Brand Boulevard
                  Glendale, California  91203-1903

Item 2(a)         Names of Persons Filing:

                  MSD Capital, L.P.
                  MSD SBI, L.P.

Item 2(b)         Addresses of Principal Business Offices:

                  MSD Capital, L.P.
                  645 Fifth Avenue, 21st Floor
                  New York, New York 10022

                  MSD SBI, L.P.
                  645 Fifth Avenue, 21st Floor
                  New York, New York 10022

Item 2(c)         Citizenship:

                  MSD Capital, L.P. - Delaware
                  MSD SBI, L.P. - Delaware

Item 2(d)         Title of Class of Securities:

                  Common Stock

Item 2(e)         CUSIP Number:

                  449623-10-7








CUSIP No. - 449623-10-7                                        Page 5 of 7 Pages


Item 3            Status of Persons Filing:

                  (a)    [ ] Broker or dealer registered under section 15 of the
                             Act (15 U.S.C. 78o);
                  (b)    [ ] Bank as defined in section 3(a)(6) of the Act
                             (15 U.S.C. 78c);
                  (c)    [ ] Insurance company as defined in section 3(a)(19) of
                             the Act (15 U.S.C. 78c);
                  (d)    [ ] Investment company registered under section 8 of
                             the Investment Company Act of 1940
                             (15 U.S.C. 80a-8);
                  (e)    [ ] An investment adviser in accordance with Section
                             240.13d-1(b)(1)(ii)(E); (f)
                         [ ] An employee benefit plan or endowment fund in
                             accordance with Section 240.13d-1(b)(1)(ii)(F);
                  (g)    [ ] A parent holding company or control person in
                             accordance with Section 240.13d-1(b)(1)(ii)(G);
                  (h)    [ ] A savings association as defined in Section 3(b) of
                             the Federal Deposit Insurance Act (12 U.S.C. 1813);
                  (i)    [ ] A church plan that is excluded from the
                             definition of an investment company under section
                             3(c)(14) of the Investment Company Act of 1940 (15
                             U.S.C. 80a-3);
                  (j)    [ ] Group, in accordance with
                             Section 240.13d-1(b)(1)(ii)(J).

Item 4            Ownership:

                  (a)    As of December 31, 2003, MSD SBI, L.P., a Delaware
                         limited partnership ("SBI"), was the record and
                         beneficial owner of 2,100,100 shares (the "Shares") of
                         Common Stock of IHOP Corp. MSD Capital, L.P., a
                         Delaware limited partnership ("MSD"), is the general
                         partner of SBI, and therefore may be deemed to be the
                         indirect beneficial owner of the Shares. MSD Capital
                         Management LLC is the general partner of MSD.

                  (b)    Percent of Class: 9.9%.

                  (c)    Number of shares as to which the person has:

                         (i)  sole power to vote or to direct the vote:

                                    0

                         (ii) shared power to vote or to direct the vote:

                                    MSD Capital, L.P. - 2,100,100
                                    MSD SBI, L.P. - 2,100,100

                         (iii) sole power to dispose or to direct the
                               disposition of:

                                    0

                         (iv) shared power to dispose or to direct the
                              disposition of:

                                    MSD Capital, L.P. - 2,100,100
                                    MSD SBI, L.P. - 2,100,100






CUSIP No. - 449623-10-7                                        Page 6 of 7 Pages


Item 5            Ownership of 5% or Less of a Class:

                  Not applicable.

Item 6            Ownership of More than 5% on Behalf of Another Person:

                  Not applicable.

Item 7            Identification and Classification of the Subsidiary Which
                  Acquired the Security Being Reported on by the Parent Holding
                  Company or Control Person:

                  Not applicable.

Item 8            Identification and Classification of Members of the Group:

                  Not applicable.

Item 9            Notice of Dissolution of Group:

                  Not applicable.

Item 10           Certification:

                  By signing below I certify that, to the best of my knowledge
                  and belief, the securities referred to above 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.







CUSIP No. - 449623-10-7                                        Page 7 of 7 Pages


                                   SIGNATURES


         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 17, 2004


                                    MSD CAPITAL, L.P.

                                    By: MSD Capital Management LLC, its general
                                        partner


                                        By: /s/ Marc R. Lisker
                                            ------------------------------------
                                            Marc R. Lisker
                                            General Counsel


                                    MSD SBI, L.P.

                                    By: MSD Capital, L.P., its general partner


                                        By: /s/ Marc R. Lisker
                                            ------------------------------------
                                            Marc R. Lisker
                                            General Counsel







                                    EXHIBITS


Exhibit A         Joint Filing Agreement, dated February 3, 2003, entered into
                  by and between MSD Capital, L.P. and MSD SBI, L.P.
                  (incorporated herein by reference to Exhibit A to Schedule 13G
                  filed with the Securities and Exchange Commission on February
                  3, 2003).