diff --git a/Mesh_3/include/CGAL/make_mesh_3.h b/Mesh_3/include/CGAL/make_mesh_3.h
index a2ead361ee6..4350b92faff 100644
--- a/Mesh_3/include/CGAL/make_mesh_3.h
+++ b/Mesh_3/include/CGAL/make_mesh_3.h
@@ -26,7 +26,7 @@
 #include <CGAL/STL_Extension/internal/Has_features.h>
 #include <CGAL/Mesh_3/C3T3_helpers.h>
 #include <CGAL/type_traits.h>
-#include <CGAL/Mesh_3/internal/tuple_like_helpers.h>
+#include <CGAL/STL_Extension/internal/tuple_like_helpers.h>
 
 #include <boost/mpl/has_xxx.hpp>
 #include <type_traits>
@@ -55,7 +55,7 @@ struct Push_to_initial_point {
   template <typename Initial_point_and_info>
   void operator()(const Initial_point_and_info& initial_pt) const {
     using T = CGAL::cpp20::remove_cvref_t<decltype(initial_pt)>;
-    if constexpr (tuple_like_of_size_2<T>)
+    if constexpr (CGAL::STL_Extension::internal::tuple_like_of_size_2<T>)
     {
       const auto& [pt, index] = initial_pt;
       const auto& cwp = c3t3_ptr->triangulation().geom_traits().construct_weighted_point_3_object();
diff --git a/STL_Extension/include/CGAL/STL_Extension/internal/tuple_like_helpers.h b/STL_Extension/include/CGAL/STL_Extension/internal/tuple_like_helpers.h
index d88bf624a0e..de9cc33c7eb 100644
--- a/STL_Extension/include/CGAL/STL_Extension/internal/tuple_like_helpers.h
+++ b/STL_Extension/include/CGAL/STL_Extension/internal/tuple_like_helpers.h
@@ -8,15 +8,13 @@
 //
 // Author(s)     : Laurent Rineau
 
-#ifndef CGAL_MESH_3_INTERNAL_TUPLE_LIKE_HELPERS_H
-#define CGAL_MESH_3_INTERNAL_TUPLE_LIKE_HELPERS_H
-
-#include <CGAL/license/Mesh_3.h>
+#ifndef CGAL_STL_EXTENSION_INTERNAL_TUPLE_LIKE_HELPERS_H
+#define CGAL_STL_EXTENSION_INTERNAL_TUPLE_LIKE_HELPERS_H
 
 #include <type_traits>
 #include <utility>
 
-namespace CGAL::Mesh_3::internal {
+namespace CGAL::STL_Extension::internal {
 
   template <typename, typename = void>
   constexpr bool has_tuple_size_v = false;
@@ -30,6 +28,6 @@ namespace CGAL::Mesh_3::internal {
   template <typename T>
   constexpr bool tuple_like_of_size_2<T, true> = (std::tuple_size_v<T> == 2);
 
-} // end namespace CGAL::Mesh_3::internal
+} // end namespace CGAL::STL_Extension::internal
 
-#endif // CGAL_MESH_3_INTERNAL_TUPLE_LIKE_HELPERS_H
+#endif // CGAL_STL_EXTENSION_INTERNAL_TUPLE_LIKE_HELPERS_H