Tunisia's President Beji Caid Essebsi on Monday announced plans to submit a draft bill to parliament equalising inheritance rights between men and women.
"I propose to make equal inheritance a law", he said in a televised speech on Tunisia's Women's Day.
The text of the bill will be presented to lawmakers after the end of the parliamentary recess in October, he said.
The proposal to equalise inheritance is among the most hotly debated of a raft of proposed social reforms, guided by a commission the president set up a year ago.
The commission suggested inheritance should by default be shared equally among male and female heirs.
Similar to many Muslim-majority countries, Tunisian law currently stipulates that male heirs should receive double the assets given to females of the same level of kinship.
"We will overturn this situation" and make equality the rule, while unequal sharing of inheritance will require special dispensation, Essebsi said.
"It is my duty as president of all Tunisians to unite and not to divide," he said.
The proposed inheritance equality law would be incorporated into the country's 2014 constitution, which has been praised as a key milestone.
Tunisians making a last will and testament would still be able to divide their assets as they see fit, with the equality law being applied in cases where no such preferences have been stipulated.
Long seen as a pioneer for women's rights in the Arab world, Tunisia has pushed ahead with other reforms promised after its 2011 revolution.
A law on violence against women, passed last year, came into force in January.
After several months of consultations with civil society and political parties, the commission also proposed decriminalising homosexuality and abolishing the death penalty.
Thousands of people protested against the proposed reforms in front of Tunisia's parliament on Saturday.
Some held copies of the Quran and shouted "we will defend Islam with our blood!"
A pro-equality protest is planned for Monday evening in the centre of the capital Tunis.