diff --git a/Stream_support/include/CGAL/IO/traits_linestring.h b/Stream_support/include/CGAL/IO/traits_linestring.h
index 110bc37959f..0e55829e09e 100644
--- a/Stream_support/include/CGAL/IO/traits_linestring.h
+++ b/Stream_support/include/CGAL/IO/traits_linestring.h
@@ -21,6 +21,8 @@
 #ifndef CGAL_IO_TRAITS_LINESTRING_H
 #define CGAL_IO_TRAITS_LINESTRING_H
 #include <CGAL/internal/Geometry_container.h>
+#include <boost/geometry/io/wkt/write.hpp>
+#include <boost/geometry/io/wkt/read.hpp>
 
 
 
diff --git a/Stream_support/include/CGAL/IO/traits_multilinestring.h b/Stream_support/include/CGAL/IO/traits_multilinestring.h
index 63fc00c264f..28b324ed1a6 100644
--- a/Stream_support/include/CGAL/IO/traits_multilinestring.h
+++ b/Stream_support/include/CGAL/IO/traits_multilinestring.h
@@ -22,6 +22,8 @@
 #define CGAL_IO_TRAITS_MULTILINESTRING_H
 
 #include <CGAL/internal/Geometry_container.h>
+#include <boost/geometry/io/wkt/write.hpp>
+#include <boost/geometry/io/wkt/read.hpp>
 
 namespace boost{
 namespace geometry{
diff --git a/Stream_support/include/CGAL/IO/traits_multipoint.h b/Stream_support/include/CGAL/IO/traits_multipoint.h
index 2dd48156471..bd140294f67 100644
--- a/Stream_support/include/CGAL/IO/traits_multipoint.h
+++ b/Stream_support/include/CGAL/IO/traits_multipoint.h
@@ -21,6 +21,8 @@
 #ifndef CGAL_IO_TRAITS_MULTIPOINT_H
 #define CGAL_IO_TRAITS_MULTIPOINT_H
 #include <CGAL/internal/Geometry_container.h>
+#include <boost/geometry/io/wkt/write.hpp>
+#include <boost/geometry/io/wkt/read.hpp>
 
 namespace boost{
 namespace geometry{
diff --git a/Stream_support/include/CGAL/IO/traits_multipolygon.h b/Stream_support/include/CGAL/IO/traits_multipolygon.h
index 4e66b2b57b7..323160ca551 100644
--- a/Stream_support/include/CGAL/IO/traits_multipolygon.h
+++ b/Stream_support/include/CGAL/IO/traits_multipolygon.h
@@ -21,6 +21,8 @@
 #ifndef CGAL_IO_TRAITS_MULTIPOLYGON_H
 #define CGAL_IO_TRAITS_MULTIPOLYGON_H
 #include <CGAL/internal/Geometry_container.h>
+#include <boost/geometry/io/wkt/write.hpp>
+#include <boost/geometry/io/wkt/read.hpp>
 
 
 namespace boost{
diff --git a/Stream_support/include/CGAL/IO/traits_point.h b/Stream_support/include/CGAL/IO/traits_point.h
index 895d067ffd1..7223512eb29 100644
--- a/Stream_support/include/CGAL/IO/traits_point.h
+++ b/Stream_support/include/CGAL/IO/traits_point.h
@@ -23,6 +23,9 @@
 
 #include <CGAL/number_utils.h>
 #include <CGAL/Point_2.h>
+#include <boost/geometry/io/wkt/write.hpp>
+#include <boost/geometry/io/wkt/read.hpp>
+
 namespace boost{
 namespace geometry{
 namespace traits{
diff --git a/Stream_support/include/CGAL/IO/traits_point_3.h b/Stream_support/include/CGAL/IO/traits_point_3.h
index cab8b024aaf..38dbfa3cdc7 100644
--- a/Stream_support/include/CGAL/IO/traits_point_3.h
+++ b/Stream_support/include/CGAL/IO/traits_point_3.h
@@ -23,6 +23,9 @@
 
 #include <CGAL/number_utils.h>
 #include <CGAL/Point_3.h>
+#include <boost/geometry/io/wkt/write.hpp>
+#include <boost/geometry/io/wkt/read.hpp>
+
 namespace boost{
 namespace geometry{
 namespace traits{
diff --git a/Stream_support/include/CGAL/IO/traits_polygon.h b/Stream_support/include/CGAL/IO/traits_polygon.h
index 6d948b7843b..1e7acb13106 100644
--- a/Stream_support/include/CGAL/IO/traits_polygon.h
+++ b/Stream_support/include/CGAL/IO/traits_polygon.h
@@ -23,6 +23,8 @@
 #include <CGAL/Polygon_2.h>
 #include <CGAL/Polygon_with_holes_2.h>
 #include <CGAL/Point_2.h>
+#include <boost/geometry/io/wkt/write.hpp>
+#include <boost/geometry/io/wkt/read.hpp>
 
 namespace boost{
 namespace geometry{