Manchester United midfielder Anderson has been ruled out of Brazil's World Cup qualifiers against Chile and Bolivia with an undisclosed injury.
The Brazilian Football Confederation today confirmed that Sao Paulo's Hernanes has been called up to replace him in Dunga's squad.
Hernanes was in the Brazil under-23 squad that took bronze at the Beijing Olympics last month.
'Being called up to the national team is always good,' Hernanes said.
'I'm happy, especially after the frustration (of missing gold) at the Olympics and not being named in the original squad.'
This is the second time Dunga has had to amend his squad with Internacional striker called in last week to replace the injured Rafael Sobis.
Brazil, who lie fifth in the South American qualifying zone, travel to Chile on Sunday, and face Bolivia three days later in Rio de Janeiro.