diff --git a/include/boost/mpl/aux_/preprocessed/plain/full_lambda.hpp b/include/boost/mpl/aux_/preprocessed/plain/full_lambda.hpp
index 27fc47b..60844fb 100644
--- a/include/boost/mpl/aux_/preprocessed/plain/full_lambda.hpp
+++ b/include/boost/mpl/aux_/preprocessed/plain/full_lambda.hpp
@@ -49,7 +49,7 @@ template< int N, typename Tag, typename Protect >
 struct lambda_impl< arg<N>,Tag,Protect >
 {
     typedef true_ is_le;
-    typedef arg<N> type;
+    typedef mpl::arg<N> type;
 };
 
 template<