diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 45ef3c002..959611bea 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -4146,7 +4146,6 @@ void GLCanvas3D::do_reset_skew(const std::string& snapshot_type)
 
     std::set<std::pair<int, int>> done;  // keeps track of modified instances
 
-    Selection::EMode selection_mode = m_selection.get_mode();
     const Selection::IndicesList& idxs = m_selection.get_volume_idxs();
 
     for (unsigned int id : idxs) {
diff --git a/src/slic3r/GUI/GUI_ObjectManipulation.cpp b/src/slic3r/GUI/GUI_ObjectManipulation.cpp
index 6fbc55511..74cb64e9f 100644
--- a/src/slic3r/GUI/GUI_ObjectManipulation.cpp
+++ b/src/slic3r/GUI/GUI_ObjectManipulation.cpp
@@ -1413,7 +1413,9 @@ void ObjectManipulation::on_change(const std::string& opt_key, int axis, double
 
 void ObjectManipulation::set_uniform_scaling(const bool use_uniform_scale)
 { 
+#if !ENABLE_TRANSFORMATIONS_BY_MATRICES
     const Selection &selection = wxGetApp().plater()->canvas3D()->get_selection();
+#endif // !ENABLE_TRANSFORMATIONS_BY_MATRICES
 #if ENABLE_WORLD_COORDINATE
     if (!use_uniform_scale) {
 #if !ENABLE_TRANSFORMATIONS_BY_MATRICES
diff --git a/src/slic3r/GUI/Selection.cpp b/src/slic3r/GUI/Selection.cpp
index 60bc8346e..4a60cbe63 100644
--- a/src/slic3r/GUI/Selection.cpp
+++ b/src/slic3r/GUI/Selection.cpp
@@ -785,7 +785,7 @@ void Selection::translate(const Vec3d& displacement, TransformationType transfor
         }
         else {
             const Vec3d offset = transformation_type.local() ?
-                volume_data.get_volume_transform().get_rotation_matrix() * displacement : displacement;
+                (Vec3d)(volume_data.get_volume_transform().get_rotation_matrix() * displacement) : displacement;
             transform_volume_relative(v, volume_data, transformation_type, Geometry::translation_transform(offset));
         }
     }