Brazilian President Luiz Inacio Lula da Silva reportedly is studying the option, as the corruption charges were never proven.
Rondeau resigned in May amid allegations that he received a 100,000-real (US$51,500) bribe from contractor Gautama for the rural power program Light for All.
"The decision is up to Lula. I studied the whole process against Rondeau and I haven't seen any evidence that he was guilty," Brazil's justice minister Tarso Genro told Bloomberg in a TV interview.
"When the scandal was revealed, I supported his resignation. If he is not found guilty, he can be called back to his functions. What we need to know now is if President Lula will want him back," Genro told Bloomberg.
Lula did not choose a permanent replacement for Rondeau. Acting mines and energy minister Nelson Hubner has said he would not be given the permanent seat at the ministry.
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