Some Federal Reserve policymakers last month were conflicted over whether to expand or cut back a program intended to drive down mortgage rates, bolster the housing market and keep the recovery going.

Minutes of the Fed's closed-door meeting on Dec. 15-16 says that a "few members" thought that the Fed's $1.25 trillion mortgage-buying program might need to be expanded and extended beyond its current end date of March 31.

However, one member thought the program might need to be scaled back.