U.S. stock index futures pointed to a higher open on Wednesday as investors await what they expect to be dovish minutes from the Federal Reserve and earnings season gets underway with Alcoa numbers.

The publication of the Federal Open Market Committee minutes of the 17-18th March meeting, when it was decided to drop the word "patient" from the policy statement as a sign of a return to a more traditional monetary policy, is expected at 2:00 p.m. ET.