diff --git a/Mesh_3/include/CGAL/Mesh_3/Protect_edges_sizing_field.h b/Mesh_3/include/CGAL/Mesh_3/Protect_edges_sizing_field.h
index d4443256fba..fda67e92fc0 100644
--- a/Mesh_3/include/CGAL/Mesh_3/Protect_edges_sizing_field.h
+++ b/Mesh_3/include/CGAL/Mesh_3/Protect_edges_sizing_field.h
@@ -47,6 +47,7 @@ namespace {
 #include <CGAL/enum.h>
 #include <CGAL/iterator.h>
 #include <CGAL/number_utils.h>
+#include <CGAL/squared_distance_3.h>
 
 namespace CGAL {
 
diff --git a/Mesh_3/include/CGAL/Mesh_3/Sliver_perturber.h b/Mesh_3/include/CGAL/Mesh_3/Sliver_perturber.h
index 2737cfafb38..66404c92369 100644
--- a/Mesh_3/include/CGAL/Mesh_3/Sliver_perturber.h
+++ b/Mesh_3/include/CGAL/Mesh_3/Sliver_perturber.h
@@ -44,6 +44,7 @@
 #include <CGAL/Timer.h>
 #include <CGAL/Mesh_3/Null_perturber_visitor.h>
 
+#include <boost/format.hpp>
 #ifdef CGAL_MESH_3_USE_RELAXED_HEAP
 #include <boost/pending/relaxed_heap.hpp>
 #else
diff --git a/Mesh_3/include/CGAL/Mesh_3/vertex_perturbation.h b/Mesh_3/include/CGAL/Mesh_3/vertex_perturbation.h
index a2fdb83fa93..556ad6e7e4b 100644
--- a/Mesh_3/include/CGAL/Mesh_3/vertex_perturbation.h
+++ b/Mesh_3/include/CGAL/Mesh_3/vertex_perturbation.h
@@ -25,7 +25,7 @@
 #ifndef CGAL_MESH_3_VERTEX_PERTURBATION_H
 #define CGAL_MESH_3_VERTEX_PERTURBATION_H
 
-
+#include <CGAL/Timer.h>
 #include <CGAL/Mesh_3/C3T3_helpers.h>
 #include <CGAL/Mesh_3/Triangulation_helpers.h>