Exhibit 28(a)(5)



                               STATE OF DELAWARE
                          CERTIFICATE OF AMENDMENT TO
                              CERTIFICATE OF TRUST

Pursuant to Title 12, Section 3810(b) of the Delaware Statutory Trust Act, the
undersigned Trust executed the following Certificate of Amendment:

1.     Name of Statutory Trust:  PIONEER FUNDAMENTAL GROWTH FUND

2.     The Certificate of Amendment to the Certificate of Trust is hereby
amended as follows:

The name of the Trust is changed from "Pioneer Fundamental Growth Fund" to
"Pioneer Series Trust X".

3.      This Certificate of Amendment shall be effective upon filing.


IN WITNESS WHEREOF, the undersigned has executed this Certificate as of the
11th day of January, 2011 A.D.


By: /s/ John F. Cogan, Jr.
    ____________________________

Name: John F. Cogan, Jr., Trustee