Fix build for older compilers
Fix build for older compilers

benlangmuir/swift,rudkx/swift,apple/swift,xwu/swift,xwu/swift,JGiola/swift,xwu/swift,ahoppen/swift,rudkx/swift,roambotics/swift,apple/swift,gregomni/swift,atrick/swift,JGiola/swift,rudkx/swift,gregomni/swift,glessard/swift,ahoppen/swift,xwu/swift,benlangmuir/swift,atrick/swift,glessard/swift,apple/swift,JGiola/swift,gregomni/swift,ahoppen/swift,JGiola/swift,gregomni/swift,xwu/swift,benlangmuir/swift,benlangmuir/swift,apple/swift,roambotics/swift,ahoppen/swift,roambotics/swift,benlangmuir/swift,glessard/swift,xwu/swift,atrick/swift,gregomni/swift,roambotics/swift,atrick/swift,rudkx/swift,benlangmuir/swift,xwu/swift,gregomni/swift,rudkx/swift,JGiola/swift,atrick/swift,glessard/swift,glessard/swift,rudkx/swift,glessard/swift,ahoppen/swift,ahoppen/swift,JGiola/swift,apple/swift,atrick/swift,roambotics/swift,roambotics/swift,apple/swift