Defendant was charged with first-degree murder, possession of a firearm during the commission of a felony, and assault with intent to *668commit murder. Pursuant to plea and sentence bargains, defendant pled guilty to second-degree murder, MCL 750.317; MSA 28.549, and possession of a firearm during the commission of a felony, MCL 750.227b; MSA 28.424(2). Defendant’s sentence, in accordance with the sentence agreement, was 5 to 15 years on the second-degree murder charge and the statutorily mandated two years on the felony-firearm charge.
Defendant appeals as of right and asserts first that his plea was not voluntary, and, hence, reversal is mandated. We do not agree.
Our review of the record indicates that the errors claimed by the defendant are raised for the first time on appeal by ex parte affidavits. This Court has addressed the practice of supplementing the appellate record by affidavit in People v Serr, 73 Mich App 19; 250 NW2d 535 (1976), People v Boone, 68 Mich App 650; 244 NW2d 4 (1976), and People v Nelson Johnson, 58 Mich App 473; 228 NW2d 429 (1975). In each case, our Court has concluded that ex parte affidavits, filed for the first time in the appellate court, may not serve to enlarge the record. Johnson, supra, 478. Where the record does not factually support the allegations defendant wishes to argue on appeal, he must first move to set aside the plea in the trial court. Boone, supra, 652. The integrity of the record made at the plea proceeding cannot be challenged on appeal where the trial court has complied with the provisions of GCR 1963, 785.7. Serr, supra, 29-30.
We note also that the plea record contains defendant’s testimony that he was satisfied with his attorney’s services. In light of this record, defendant’s claim on appeal of an involuntary plea based on incompetence of counsel is without merit.
*669Second, defendant asserts that the trial court reversibly erred in failing to advise him that he could not be placed on probation upon his plea to second-degree murder. GCR 1963, 785.7(1)(f). People v Freeman, 73 Mich App 568; 252 NW2d 518 (1977), is controlling on this issue. The Freeman Court reasoned it was not reversible error when Rule 785.7(1)(f) was not strictly complied with if defendant knew before pleading that he was going to prison. We conclude that in this case, because defendant knew he was going to prison as part of the sentence bargain, the court’s failure to instruct defendant on his ineligibility for probation was not reversible error.
Finally, defendant alleges that the trial court should have told defendant that he could not earn good time upon his conviction for murder under Proposal B, MCL 791.233b; MSA 28.2303(3).
The purpose of GCR 1963, 785.7(l)(d) is to inform a defendant of the minimum term he will serve in prison so that his guilty plea will be premised on the conscious awareness of the plea consequences. We agree with defendant that it would not be possible for this defendant to have known the minimum sentence he would have to serve unless he was advised of the mandatory requirements of Proposal B. While this legislation was enacted in 1978, subsequent to Guilty Plea Cases, 395 Mich 96; 235 NW2d 132 (1975), and our Supreme Court has not spoken to this issue, the thrust of their opinions which have defined the parameters of the mandatory sentencing rule is that the defendant must be made aware, by the court, of the true minimum term he will serve by virtue of his plea. People v Jones, 410 Mich 407; 301 NW2d 822 (1981), and People v Mitchell, 102 Mich App 554; 302 NW2d 230 (1980). That requirement was not met here.
*670We remand this cause to the trial court to permit defendant to withdraw his guilty plea.