The status of children in Indonesia has been regulated in various laws and regulations. In marriage law, it is defined that a legitimate child is a child born from or in a legal marriage. However, after the issuance of the Constitutional Court's decision on the status of children out of wedlock, a debate arose among legal academics and practitioners of Islamic law in Indonesia. This debate is quite challenging and does not clear up the problem. This article aims to discuss the status of children out of wedlock after the issuance of the Constitutional Court. This article is a literature study, and the data were collected by investigating regulations and decisions regarding the status of children. This article argues that the constitutional court's decision establishes a new norm, which revises the rule of article 43 in the marriage law. According to the constitutional court's decision, children born out of wedlock have a civil relationship not only from the mother's line but also from the father's line on the condition that they can be proven biologically and scientifically.