
761 S.W.2d 1 (1988)
Ricardo DIAZ, Appellant,
v.
The STATE of Texas, Appellee.
No. 048-87.
Court of Criminal Appeals of Texas, En Banc.
November 9, 1988.
Oscar J. Pena, Sr., Laredo, for appellant.
Julio A. Garcia, Dist. Atty. and Jose A. Flores, Jr. and Carlos H. Barrera, Asst. Dist. Attys., Laredo, Robert Huttash, State's Atty., Austin, for the State.
Before the court en banc.

OPINION ON APPELLANT'S PETITION FOR DISCRETIONARY REVIEW
PER CURIAM.
Appeal is taken from a conviction for the offense of murder. After finding appellant guilty, the jury assessed punishment at 40 years' imprisonment.
On direct appeal, appellant argued the trial court erred in instructing the jury on the law concerning good time and parole, inasmuch as the charge is predicated upon an unconstitutional statute. The Court of Appeals rejected appellant's challenge to Article 37.07, § 4, V.A.C.C.P. Diaz v. State, *2 722 S.W.2d 482 (Tex.App.-San Antonio 1986).
In his petition for discretionary review, appellant urges the Court of Appeals erred in holding Article 37.07, § 4, supra, is constitutional. We find appellant is correct.
In Rose v. State, 752 S.W.2d 529 (Tex.Cr. App.1988), this Court determined that Article 37.07, § 4, is unconstitutional. Under Rose, supra, if a harmless error analysis is necessary, such analysis should be conducted under the guidelines of Tex.R.App.P. 81(b)(2).
The judgment of the Court of Appeals is vacated and this cause is remanded to that court for further proceedings consistent with this opinion.
