diff --git a/xs/src/libslic3r/Model.cpp b/xs/src/libslic3r/Model.cpp
index f723ca856..1cd3b1413 100644
--- a/xs/src/libslic3r/Model.cpp
+++ b/xs/src/libslic3r/Model.cpp
@@ -743,21 +743,6 @@ void ModelObject::rotate(float angle, const Vec3d& axis)
     this->invalidate_bounding_box();
 }
 
-void ModelObject::transform(const float* matrix3x4)
-{
-    if (matrix3x4 == nullptr)
-        return;
-
-    for (ModelVolume* v : volumes)
-    {
-        v->mesh.transform(matrix3x4);
-        v->m_convex_hull.transform(matrix3x4);
-    }
-
-    this->origin_translation = Vec3d::Zero();
-    this->invalidate_bounding_box();
-}
-
 void ModelObject::mirror(const Axis &axis)
 {
     for (ModelVolume *v : this->volumes)
diff --git a/xs/src/libslic3r/Model.hpp b/xs/src/libslic3r/Model.hpp
index 140a0270a..f8a36527d 100644
--- a/xs/src/libslic3r/Model.hpp
+++ b/xs/src/libslic3r/Model.hpp
@@ -122,7 +122,6 @@ public:
     void scale(const Vec3d &versor);
     void rotate(float angle, const Axis &axis);
     void rotate(float angle, const Vec3d& axis);
-    void transform(const float* matrix3x4); // <<<<<<<<< FIXME (using eigen)
     void mirror(const Axis &axis);
     size_t materials_count() const;
     size_t facets_count() const;
diff --git a/xs/src/libslic3r/TriangleMesh.cpp b/xs/src/libslic3r/TriangleMesh.cpp
index 91432f3b5..6840bc96e 100644
--- a/xs/src/libslic3r/TriangleMesh.cpp
+++ b/xs/src/libslic3r/TriangleMesh.cpp
@@ -279,15 +279,6 @@ void TriangleMesh::mirror(const Axis &axis)
     stl_invalidate_shared_vertices(&this->stl);
 }
 
-void TriangleMesh::transform(const float* matrix3x4)
-{
-    if (matrix3x4 == nullptr)
-        return;
-
-    stl_transform(&stl, const_cast<float*>(matrix3x4));
-    stl_invalidate_shared_vertices(&stl);
-}
-
 void TriangleMesh::align_to_origin()
 {
     this->translate(
diff --git a/xs/src/libslic3r/TriangleMesh.hpp b/xs/src/libslic3r/TriangleMesh.hpp
index c42a0934d..666252887 100644
--- a/xs/src/libslic3r/TriangleMesh.hpp
+++ b/xs/src/libslic3r/TriangleMesh.hpp
@@ -48,7 +48,6 @@ public:
     void mirror_x() { this->mirror(X); }
     void mirror_y() { this->mirror(Y); }
     void mirror_z() { this->mirror(Z); }
-    void transform(const float* matrix3x4);
     void align_to_origin();
     void rotate(double angle, Point* center);
     TriangleMeshPtrs split() const;