OPINION
Per Curiam:Appellant was convicted of burglary, a felony. NRS 205.060. Following closing arguments, in addition to giving the jury the statutory instruction on reasonable doubt, the trial judge gave an instruction in contrast to a statute precluding any other definition of reasonable doubt than that contained in the statute.1 On appeal Appellant asserts this constitutes reversible error. Here, we find the claim to be without substance.
*387In the instant case, the additional jury instruction read:
It is not necessary that the defendant’s guilt should be established beyond any doubt or to an absolute certainty, but instead thereof that the defendant’s guilt must be established beyond a reasonable doubt as hereinafter defined.
In Tucker v. State, 92 Nev. 486, 553 P.2d 951 (1976), this Court stated:
[w]hile we disapprove this practice, because we believe the reasonable doubt statute speaks for itself, this court has previously permitted such additional instructions that merely clarify the statutory instruction. . . . Here, we do not believe this district court’s attempted clarification could have misled the jury concerning its duties in this case.
Id. at 490, 553 P.2d at 953-54. In accord, Jackson v. State, 93 Nev. 28, 572 P.2d 927 (1977).
As in Tucker and Jackson, supra, we reiterate our disapproval of the lower courts’ giving of the additional instruction. However, in doing so, it did not commit prejudicial error. ' The judgment is affirmed.
NRS 175.211 provides that:
(1) A reasonable doubt is one based on reason. It is not mere' possible doubt, but is such a doubt as would govern or control a person in the more weighty affairs of life. If the minds of the jurors, after the entire comparison and consideration of all the evidence, are in such a condition that they can say they feel an abiding conviction of the truth of the charge, there is not a reasonable doubt. Doubt to be reasonable must be actual and substantial,'not mere possibility or speculation.
(2) No other definition of reasonable doubt shall be given by the court to juries in criminal actions in this state. (Emphasis supplied.)