diff --git a/test/algorithms/envelope_expand/envelope_on_spheroid.cpp b/test/algorithms/envelope_expand/envelope_on_spheroid.cpp
index 5d964e3c6b..d677220a05 100644
--- a/test/algorithms/envelope_expand/envelope_on_spheroid.cpp
+++ b/test/algorithms/envelope_expand/envelope_on_spheroid.cpp
@@ -201,7 +201,7 @@ class envelope_on_spheroid_basic_tester
         T3 const& lon_max, T4 const& lat_max, double height_max,
         double tolerance)
     {
-        using box_units_type = bg::detail::coordinate_system_unit_t<Box>;
+        using box_units_type = bg::detail::coordinate_system_units_t<Box>;
 
         std::string const units_str = units2string<box_units_type>();