diff --git a/MDS_3/include/CGAL/IO/File_medit.h b/MDS_3/include/CGAL/IO/File_medit.h
index d218bfd802a..bb9b34862c1 100644
--- a/MDS_3/include/CGAL/IO/File_medit.h
+++ b/MDS_3/include/CGAL/IO/File_medit.h
@@ -16,6 +16,7 @@
 
 #include <CGAL/license/MDS_3.h>
 
+#include <CGAL/MDS_3/Mesh_complex_3_in_triangulation_3_fwd.h>
 #include <CGAL/Mesh_complex_3_in_triangulation_3.h>
 #include <CGAL/MDS_3/tet_soup_to_c3t3.h>