Mr Brown also used the meeting to tell MPs that the Glenrothes by-election will be held on November 6.
The by-election represents another difficult test for Mr Brown after the loss of Glasgow East in July – where the Scottish National Party overturned a 13,000 Labour majority – which sparked talk of a leadership challenge.
In Glenrothes, the SNP hope to pull off another triumph.
Mr Brown, who represents the neighbouring Kirkcaldy and Cowdenbeath constituency, was said by aides to be keen to campaign in the seat, although a decision will depend on the state of the global economy.
