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.

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.

Mexico says it’s awaiting a new response from Google to its request that the tech company fully restore the name Gulf of Mexico to its Google Maps service before filing a lawsuit