The 22-year-old will go straight into the squad for tomorrow’s clash at Guiseley AFC.
Lewis joined Cambridge on a three-and-a-half-year contract from Macclesfield Town for an undisclosed fee last January and made thirteen appearances last season.
He scored 17 goals in 108 National League games for the Silkmen, including a hat-trick against Tranmere Rovers in his final game at the Moss Rose.