diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index 96305c2b6a2..0d5637985aa 100644
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -262,7 +262,8 @@ public:
   typedef std::vector<std::pair<SDOperand, const Type*> > ArgListTy;
   virtual std::pair<SDOperand, SDOperand>
   LowerCallTo(SDOperand Chain, const Type *RetTy, bool isVarArg,
-              SDOperand Callee, ArgListTy &Args, SelectionDAG &DAG) = 0;
+              unsigned CallingConv, SDOperand Callee, ArgListTy &Args,
+              SelectionDAG &DAG) = 0;
 
   /// LowerVAStart - This lowers the llvm.va_start intrinsic.  If not
   /// implemented, this method prints a message and aborts.