diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index d08d9bc..0032cd3 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -53,7 +53,7 @@
   case Builtin::BI__builtin_stdarg_start:
   case Builtin::BI__builtin_va_start:
   case Builtin::BI__builtin_va_end: {
-    Value *ArgValue = EmitScalarExpr(E->getArg(0));
+    Value *ArgValue = EmitLValue(E->getArg(0)).getAddress();
     const llvm::Type *DestType = 
       llvm::PointerType::getUnqual(llvm::Type::Int8Ty);
     if (ArgValue->getType() != DestType)