diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index 139122d47b1..4e1533a8e7e 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -968,8 +968,8 @@ private:
   void untieRegOperand(unsigned OpIdx) {
     MachineOperand &MO = getOperand(OpIdx);
     if (MO.isReg() && MO.isTied()) {
-      getOperand(findTiedOperandIdx(OpIdx)).TiedTo = false;
-      MO.TiedTo = false;
+      getOperand(findTiedOperandIdx(OpIdx)).TiedTo = 0;
+      MO.TiedTo = 0;
     }
   }