diff --git a/include/boost/preprocessor/detail/iterate/local_iterate.hpp b/include/boost/preprocessor/detail/iterate/local_iterate.hpp
index 8e4769a..eade7b3 100644
--- a/include/boost/preprocessor/detail/iterate/local_iterate.hpp
+++ b/include/boost/preprocessor/detail/iterate/local_iterate.hpp
@@ -8,7 +8,7 @@
 #  *                                                                          *
 #  ************************************************************************** */
 #
-# line BOOST_PP_DETAIL_LINE()
+# line BOOST_PP_DETAIL_LINE(_)
 #
 # ifdef BOOST_PP_LOCAL_ITERATION_LIMITS
 #   define BOOST_PP_LOCAL_START BOOST_PP_TUPLE_ELEM(2, 0, BOOST_PP_LOCAL_ITERATION_LIMITS)
diff --git a/include/boost/preprocessor/detail/iterate/self.hpp b/include/boost/preprocessor/detail/iterate/self.hpp
index 80fa317..893ae61 100644
--- a/include/boost/preprocessor/detail/iterate/self.hpp
+++ b/include/boost/preprocessor/detail/iterate/self.hpp
@@ -8,7 +8,7 @@
 #  *                                                                          *
 #  ************************************************************************** */
 #
-# line BOOST_PP_DETAIL_LINE()
+# line BOOST_PP_DETAIL_LINE(indirect inclusion of BOOST_PP_INDIRECT_SELF)
 #
 # if !defined(BOOST_PP_INDIRECT_SELF)
 #   error BOOST_PP:  no file to indirect file to include defined