diff --git a/include/llvm/CodeGen/MachineInstrBuilder.h b/include/llvm/CodeGen/MachineInstrBuilder.h
index 4d63d99e45b..138f8b58d89 100644
--- a/include/llvm/CodeGen/MachineInstrBuilder.h
+++ b/include/llvm/CodeGen/MachineInstrBuilder.h
@@ -35,6 +35,7 @@ public:
   /// Allow automatic conversion to the machine instruction we are working on.
   ///
   operator MachineInstr*() const { return MI; }
+  operator MachineBasicBlock::iterator() const { return MI; }
 
   /// addReg - Add a new virtual register operand...
   ///