diff --git a/llvm/include/llvm/CodeGen/MachineBasicBlock.h b/llvm/include/llvm/CodeGen/MachineBasicBlock.h
index 71739278cf513..fcf7bab09fcff 100644
--- a/llvm/include/llvm/CodeGen/MachineBasicBlock.h
+++ b/llvm/include/llvm/CodeGen/MachineBasicBlock.h
@@ -129,7 +129,7 @@ class MachineBasicBlock
     MCRegister PhysReg;
     LaneBitmask LaneMask;
 
-    RegisterMaskPair(MCPhysReg PhysReg, LaneBitmask LaneMask)
+    RegisterMaskPair(MCRegister PhysReg, LaneBitmask LaneMask)
         : PhysReg(PhysReg), LaneMask(LaneMask) {}
 
     bool operator==(const RegisterMaskPair &other) const {