On December 5, 1949, the petitioner was sentenced to •serve an indeterminate sentence of 14 to 15 years’ imprison:ment in the penitentiary for the crime of first-degree bur,-glary, subsequent offense. We issued a writ of habeas -corpus to determine the validity of the said sentence.

The offense of first-degree burglary is punishable Iby imprisonment in the penitentiary from 1 to 15 years. Section 410 of the Penal Code, 1937 (33 L.P.R.A. § 1593). When it is a subsequent offense, the offender is punished by *155imprisonment for the longest term, namely, 15 years in the penitentiary. Section 57(2) of the Penal Code, 1937 (33 L.P.R.A. § 132).1 Morales v. Saldaña, 63 P.R.R. 57. The Code therefore provides a fixed and specific term of imprisonment for the crime of first-degree burglary, subsequent offense. On other occasions we have said that the adjective “subsequent,” placed before the classification of a crime, does not alter the elements constituting the crime, and that it affects only the discretion of the judge in pronouncing sentence. People v. Cancio, 53 P.R.R. 520. In González v. Rivera, Warden, 71 P.R.R. 735, we said at p. 737: “The allegation of a previous conviction of another offenses does not charge a crime by itself. Its only purpose is to bring the case within the statute and to impose on the accused the heavier penalty fixed thereby. [Citations.]” The crime committed by the petitioner was therefore first-degree burglary. We must determine, first, the penalty prescribed at present when the offender is convicted of that crime as a subsequent offender.

Ever since the operation of the Indeterminate Sentence Act — 34 L.P.R.A. § 1024 — 2 the judges lack power *156to pronounce sentence with a specific time limit. These provisions of the said Act are mandatory. People v. Rodríguez, 69 P.R.R. 507; People v. Luciano, 77 P.R.R. 564. We agree with the attorney for the petitioner that, while §57(2) of the Penal Code provides a fixed penalty for the subsequent offense of first-degree burglary, the Indeterminate Sentence Act provides for the imposition of a sentence without a specific time limit for all felonies not entailing life imprisonment, as a result of which there is an irreconcilable conflict between both statutes. However, §57(2) of the Penal Code has not been impliedly repealed in its entirety, as argued by the appellant. Effect may and .should be given in part to the said provision, the purpose of which is, as already noted, to impose a heavier penalty on the subsequent offender.

This is accomplished by the imposition of a maximum term which should never be less than the maximum — fixed penalty — provided in paragraph 2 of § 57 supra, and a minimum term which shall not be less than that provided by the Penal Code for the offense of first-degree burglary. In this manner effect is given to the Indeterminate Sentence Act and at the same time the subsequent offense of first-degree burglary is punished more severely.

The trial judge was of the opinion, as we now hold, that, notwithstanding the provisions of § 57(2), he was bound to .impose on the defendant, petitioner herein, an indeterminate sentence, which he did, sentencing him to serve from 14 to .15 years’ imprisonment in the penitentiary. After making the corresponding reductions,3 these terms are reduced as .follows: the minimum of 14 years, to 8 years 11 months, and 25 days; and the maximum term of 15 years, to 9 years, 2 months, and 2 days. This computation leaves a margin of *157only 2 months and 7 days between the minimum term and the maximum term. There is no doubt that such a small margin of fluctuation thwarts completely the purposes sought by the Indeterminate Sentence Act.4 Already in People v. Superior Court, 78 P.R.R. 135,5 we had foreseen a situation such as this one, in which the minimum term fixed is so severe that it actually converts the sentence into a fixed one, or does not allow a reasonable margin of fluctuation between the shortest minimum possible and the highest maximum which may be imposed, thereby violating the principle of the indetermination.

The sentence imposed on the petitioner violates this principle and is therefore void.

*158The petitioner will be resentenced by the trial court in harmony with the principles stated in this opinion, and the indeterminate sentence to be imposed shall provide for a maximum term of 15 years’ imprisonment and a minimum term for the shortest time possible, but not less than the minimum term provided by law for the crime of first-degree burglary.