The isothermal and nonisothermal linear viscoelastic creep compliance was measured for an amorphous styrene‐butadiene random copolymer. The compliance master curve was constructed from the linear viscoelastic creep isotherms via time‐temperature superposition. The polymer was annealed at a constant temperature, and then the nonisothermal creep response was measured as the specimen was heated at a constant rate through the glass‐to‐rubber transition. At a specific annealing temperature, a single nonisothermal master curve was obtained for all heating rates using the temperature reduced timetT*,where thetT*integral was determined from thelog αTshift factor. At annealing temperatures well above and well belowTg,the nonisothermal master curve was identical to the master curve constructed by time‐temperature superposition; however, at annealing temperatures nearTgthe nonisothermal master curves were significantly different. This difference between isothermal and nonisothermal behavior is a consequence of nonequilibrium effects in the glass‐to‐rubber transition. The implication of the experimental observations are discussed.