Douglas missed the 2-0 midweek win over Motherwell with the injury sustained in the Scottish Cup draw with Ross County last weekend.
Craig Conway returned off the substitutes' bench against Well, but is not expected to start, while Danny Swanson (back), Scott Severin (foot), Mihael Kovacevic (knee) and Darren Dods (knee) remain out.
Source: PA
Source: PA