The Dutch veteran, who led the Caribbean island nation through qualifying, will be oldest coach in World Cup history.
The smallest nation by population to qualify for a men's World Cup has less than five weeks the prepare for a testing opening game against Germany in Houston.
Advocaat stepped down in February, citing his daughter's health issues, to be replace by compatriot Fred Rutten.
Under Rutten the team lost two warm-up games in Australia in March — 5-1 against Australia and 2-0 to China. Pressure grew to restore Advocaat amid claims of player discontent and a statement seeking his return from the federation's leading sponsor.
Curacao federation president Gilbert Martina, at a press conference on Tuesday, denied there had been a player putsch.
Martina said Rutten had called him on Sunday to say he felt it was best to step down and Martina then called Advocaat.
Curacao is an autonomous territory of about 156,000 people in the Caribbean within the Netherlands kingdom. The team relies almost entirely on players born and raised in the Netherlands.
The team also will play Ecuador in Kansas City and Ivory Coast in Philadelphia.
Advocaat took his native Netherlands to the quarter-finals in 1994, and coached South Korea at the 2006 edition.
The previous oldest coach, German Otto Rehhagel, was 71 when he led Greece at the 2010 finals.
with Reuters
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