diff --git a/include/boost/iterator/advance.hpp b/include/boost/iterator/advance.hpp
index 6f81cdb..92af8fb 100644
--- a/include/boost/iterator/advance.hpp
+++ b/include/boost/iterator/advance.hpp
@@ -77,7 +77,7 @@ namespace iterators {
 
 } // namespace iterators
 
-using iterators::advance;
+using namespace iterators::advance_adl_barrier;
 
 } // namespace boost
 
diff --git a/include/boost/iterator/distance.hpp b/include/boost/iterator/distance.hpp
index 8cf3f15..bef650b 100644
--- a/include/boost/iterator/distance.hpp
+++ b/include/boost/iterator/distance.hpp
@@ -58,7 +58,7 @@ namespace iterators {
 
 } // namespace iterators
 
-using iterators::distance;
+using namespace iterators::distance_adl_barrier;
 
 } // namespace boost