diff --git a/include/boost/geometry/extensions/gis/projections/factory.hpp b/include/boost/geometry/extensions/gis/projections/factory.hpp
index 0acb12eb7..5847cc5fe 100644
--- a/include/boost/geometry/extensions/gis/projections/factory.hpp
+++ b/include/boost/geometry/extensions/gis/projections/factory.hpp
@@ -28,7 +28,7 @@
 #include <boost/geometry/extensions/gis/projections/proj/cass.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/cc.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/cea.hpp>
-#include <boost/geometry/extensions/gis/projections/proj/chamb.hpp>  // control points XY
+#include <boost/geometry/extensions/gis/projections/proj/chamb.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/collg.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/crast.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/denoy.hpp>
@@ -47,12 +47,12 @@
 #include <boost/geometry/extensions/gis/projections/proj/gins8.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/gn_sinu.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/gnom.hpp>
-#include <boost/geometry/extensions/gis/projections/proj/goode.hpp> // includes two other projections
+#include <boost/geometry/extensions/gis/projections/proj/goode.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/gstmerc.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/hammer.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/hatano.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/krovak.hpp>
-#include <boost/geometry/extensions/gis/projections/proj/imw_p.hpp> // xy functions after inverse
+#include <boost/geometry/extensions/gis/projections/proj/imw_p.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/isea.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/laea.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/labrd.hpp>
@@ -77,7 +77,7 @@
 #include <boost/geometry/extensions/gis/projections/proj/nocol.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/nsper.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/nzmg.hpp>
-#include <boost/geometry/extensions/gis/projections/proj/ob_tran.hpp> // includes other projection
+#include <boost/geometry/extensions/gis/projections/proj/ob_tran.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/ocea.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/oea.hpp>
 #include <boost/geometry/extensions/gis/projections/proj/omerc.hpp>