diff --git a/test/extensions/gis/projections/projections.cpp b/test/extensions/gis/projections/projections.cpp
index 773d60b69..9ea76e77b 100644
--- a/test/extensions/gis/projections/projections.cpp
+++ b/test/extensions/gis/projections/projections.cpp
@@ -28,6 +28,7 @@
 #include <boost/geometry/geometries/geometries.hpp>
 #include <boost/geometry/geometries/adapted/c_array.hpp>
 #include <boost/geometry/extensions/gis/latlong/point_ll.hpp>
+
 #include <test_common/test_point.hpp>
 
 
@@ -37,6 +38,8 @@ inline void check(double v, double ve, std::string const& name, std::string cons
     // Instead of (non-existing) BOOST_CHECK_CLOSE_MESSAGE(v, ve, 0.001, bla bla)
 
     if (! boost::test_tools::check_is_close(v, ve, boost::test_tools::percent_tolerance(0.001)))
+    // Boost.Trunk:
+    //if (! boost::test_tools::check_is_close(v, ve, boost::math::fpc::percent_tolerance(0.001)))
     {
         std::ostringstream out;
         out << "\n" << name << " " << axis << " -> " << v << " != " << ve;