diff --git a/src/libslic3r/CutUtils.cpp b/src/libslic3r/CutUtils.cpp
index 11c2d62d8c..1622af87e1 100644
--- a/src/libslic3r/CutUtils.cpp
+++ b/src/libslic3r/CutUtils.cpp
@@ -1,9 +1,11 @@
 
 #include "CutUtils.hpp"
+#include "Geometry.hpp"
 #include "libslic3r.h"
 #include "Model.hpp"
 #include "TriangleMeshSlicer.hpp"
 #include "TriangleSelector.hpp"
+#include "ObjectID.hpp"
 
 
 namespace Slic3r {
diff --git a/src/libslic3r/CutUtils.hpp b/src/libslic3r/CutUtils.hpp
index 7aa445160b..2c477a3e2b 100644
--- a/src/libslic3r/CutUtils.hpp
+++ b/src/libslic3r/CutUtils.hpp
@@ -1,10 +1,7 @@
 #ifndef slic3r_CutUtils_hpp_
 #define slic3r_CutUtils_hpp_
 
-#include "libslic3r.h"
 #include "enum_bitmask.hpp"
-#include "Geometry.hpp"
-#include "ObjectID.hpp"
 #include "Point.hpp"
 #include "Model.hpp"
 
@@ -23,7 +20,7 @@ class Cut {
 
     Model                       m_model;
     int                         m_instance;
-    const Transform3d&          m_cut_matrix;
+    const Transform3d           m_cut_matrix;
     ModelObjectCutAttributes    m_attributes;
 
     void post_process(ModelObject* object, ModelObjectPtrs& objects, bool keep, bool place_on_cut, bool flip);