Mexico will take Google to court if maps shown to US-based users continue to label the Gulf of Mexico as the Gulf of America across the entire body of water, President Claudia Sheinbaum said Monday, arguing that US President Donald Trump’s order to rename it only applies to the part of the continental shelf under US control.

Google is among the first companies to rename maps from Gulf of Mexico to Gulf of America. Other software leaders, like Apple Maps, are starting to follow suit.

The name change to Gulf of America is the first since the 1540s where various maps referred to it as the Mexican Gulf, Golpho de la Nueva España, and, finally Gulf of Mexico.