Exhibit 3.4

                  CERTIFICATE OF CORRECTION FILED TO CORRECT
               A CERTAIN ERROR IN THE CERTIFICATE OF DESIGNATIONS
                     OF SERIES D CONVERTIBLE PREFERRED STOCK
                          OF HEMISPHERX BIOPHARMA, INC.
                  FILED IN THE OFFICE OF THE SECRETARY OF STATE
                           OF DELAWARE ON JULY 3, 1996

Hemispherx  Biopharma,  Inc., a corporation  organized and existing under and by
virtue of the General Corporation Law of the State of Delaware.

     DOES HEREBY CERTIFY:

     1.The name of the corporation is Hemispherx Biopharma, Inc.

     2. That a Certificate  of  Designations  of Series D Convertible  Preferred
Stock (the  "Certificate") was filed with the Secretary of State of the State of
Delaware  on July 3,  1996 and  that  the  Certificate  requires  correction  as
permitted  by  Section  103 of the  General  Corporation  Law  of the  State  of
Delaware.

     3. The  inaccuracy  or  defect  of the  Certificate  to be  corrected  is a
typographical error in the last sentence of Section 9(d) of the Certificate.

     4. The last  sentence of Section  9(d) of the  Certificate  is corrected to
read as follows:

In connection  with any  conversion of shares of Series D Convertible  Preferred
Stock  pursuant to this Section 9(d), the  Corporation  shall not have the right
provided  in Section  9(a) to redeem any portion of such shares for cash in lieu
of such conversion.

     IN WITNESS  WHEREOF,  said  Hemispherx  Biopharma,  Inc.  has  caused  this
Certificate to be signed by William A. Carter,  M.D.,  its President,  as of the
19th day of August, 1996.

                                        HEMISPHERX BIOPHARMA, INC.

                                        By /s/  William A. Carter
                                           ----------------------
                                                   President