IN THE UNITED STATES COURT OF APPEALS
                       FOR THE FIFTH CIRCUIT



                           No. 98-20026
                         Summary Calendar


                      DAVID ANTHONY DYBOWSKI,

                                                Plaintiff-Appellant,

                              versus

  WAYNE SCOTT, director, Texas Department of Criminal Justice,
   Institutional Division and GARY L. JOHNSON, Director, Texas
     Department of Criminal Justice, Institutional Division,

                                                Defendant-Appellees.


          Appeal from the United States District Court
               for the Southern District of Texas
                          (H-97-CV-3065)
                         August 13, 1998

Before JOHNSON, HIGGINBOTHAM, and DAVIS, Circuit Judges.

PER CURIAM:*

     David Anthony Dybowski, Texas prisoner #670925, appeals pro se

the district court’s dismissal as frivolous of his claims filed

pursuant to 42 U.S.C. §1983.      When construed liberally,1 the

arguments contained in his pleadings contend that the present

statute governing the calculation of his good conduct time violates

his equal protection and due process rights.

     We review the district court’s dismissal of Dybowski’s equal



    *
       Pursuant to 5th CIR. R. 47.5, the court has determined that
this opinion should not be published and is not precedent except
under the limited circumstances set forth in 5th CIR. R. 47.5.4.
     1
      The pleadings of a pro se litigant must be given a liberal
construction. Haines v. Kerner, 

, 520 (1972).
protection claim for abuse of discretion. Denton v. Hernandez, 

, 33-34 (1992). Dybowski was convicted of an aggravated

offense.     He argues that TEX. CODE CRIM P. art. 42.18 §8(c) (West

1990) violates his equal protection rights because it prevents good

conduct time from being credited toward the prison sentences of

prisoners convicted of aggravated offenses.              Classifying prisoners

by the offense of conviction does not create a suspect class.

Wottlin v.     Fleming,   

,      1036-37    (5th   Cir.   1998).

Furthermore, a prisoner does not have a constitutional right to be

released before the expiration of a valid sentence.                   

Therefore,    there     need    only     be   a     rational    basis      for    the

classification.        After a careful review of the record and the

controlling authorities, we hold that the district court did not

abuse its discretion in concluding that a rational basis existed.

     Dybowski    did    not    raise    his   due    process    argument     in   the

district court, so we review this issue for plain error.                          See

Highlands Ins. v. National Union Fire Ins., 

, 1031-32

(5th Cir. 1994).       Dybowski contends that the repeal of TEXAS REV.

CIV. STAT. ANN. art. 6184-1 (West 1979), which would have allowed a

credit towards his sentence for good conduct time regardless of his

offense, violated his due process rights. Because Dybowski did not

earn good conduct time during the effective date of the statute,

his claim is without merit.             Thus, the district court did not

plainly err in dismissing as frivolous Dybowski’s due process

claim.

     AFFIRMED.


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