diff --git a/lib/IR/Constants.cpp b/lib/IR/Constants.cpp
index dbb3495583b..1f6f5ac4270 100644
--- a/lib/IR/Constants.cpp
+++ b/lib/IR/Constants.cpp
@@ -2783,6 +2783,7 @@ Instruction *ConstantExpr::getAsInstruction() {
   case Instruction::PtrToInt:
   case Instruction::IntToPtr:
   case Instruction::BitCast:
+  case Instruction::AddrSpaceCast:
     return CastInst::Create((Instruction::CastOps)getOpcode(),
                             Ops[0], getType());
   case Instruction::Select: