diff --git a/src/libslic3r/Technologies.hpp b/src/libslic3r/Technologies.hpp
index 2e35e48afb..065500cff2 100644
--- a/src/libslic3r/Technologies.hpp
+++ b/src/libslic3r/Technologies.hpp
@@ -23,8 +23,6 @@
 #define ENABLE_MODELVOLUME_TRANSFORM (1 && ENABLE_1_42_0)
 // Keeps objects on bed while scaling them using the scale gizmo
 #define ENABLE_ENSURE_ON_BED_WHILE_SCALING (1 && ENABLE_MODELVOLUME_TRANSFORM)
-// Gizmos always rendered on top of objects
-#define ENABLE_GIZMOS_ON_TOP (1 && ENABLE_1_42_0)
 // All rotations made using the rotate gizmo are done with respect to the world reference system
 #define ENABLE_WORLD_ROTATIONS (1 && ENABLE_1_42_0)
 // Enables shortcut keys for gizmos
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 0ff388eab4..0c17cd371b 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -1029,9 +1029,7 @@ GLCanvas3D::Mouse::Mouse()
     : dragging(false)
     , left_down(false)
     , position(DBL_MAX, DBL_MAX)
-#if ENABLE_GIZMOS_ON_TOP
     , scene_position(DBL_MAX, DBL_MAX, DBL_MAX)
-#endif // ENABLE_GIZMOS_ON_TOP
 {
 }
 
@@ -3865,12 +3863,10 @@ void GLCanvas3D::render()
         _render_bed(theta);
     }
 
-#if ENABLE_GIZMOS_ON_TOP
     // we need to set the mouse's scene position here because the depth buffer
     // could be invalidated by the following gizmo render methods
     // this position is used later into on_mouse() to drag the objects
     m_mouse.scene_position = _mouse_to_3d(m_mouse.position.cast<int>());
-#endif // ENABLE_GIZMOS_ON_TOP
 
     _render_current_gizmo();
 #if ENABLE_SHOW_CAMERA_TARGET
@@ -4692,29 +4688,15 @@ void GLCanvas3D::on_mouse(wxMouseEvent& evt)
             {
                 if (evt.LeftDown() && m_moving_enabled && (m_mouse.drag.move_volume_idx == -1))
                 {
-#if !ENABLE_GIZMOS_ON_TOP
-                    // The mouse_to_3d gets the Z coordinate from the Z buffer at the screen coordinate pos x, y,
-                    // an converts the screen space coordinate to unscaled object space.
-                    Vec3d pos3d = _mouse_to_3d(pos);
-#endif // !ENABLE_GIZMOS_ON_TOP
-
                     // Only accept the initial position, if it is inside the volume bounding box.
                     BoundingBoxf3 volume_bbox = m_volumes.volumes[m_hover_volume_id]->transformed_bounding_box();
                     volume_bbox.offset(1.0);
-#if ENABLE_GIZMOS_ON_TOP
                     if (volume_bbox.contains(m_mouse.scene_position))
-#else
-                    if (volume_bbox.contains(pos3d))
-#endif // ENABLE_GIZMOS_ON_TOP
                     {
                         // The dragging operation is initiated.
                         m_mouse.drag.move_volume_idx = m_hover_volume_id;
                         m_selection.start_dragging();
-#if ENABLE_GIZMOS_ON_TOP
                         m_mouse.drag.start_position_3D = m_mouse.scene_position;
-#else
-                        m_mouse.drag.start_position_3D = pos3d;
-#endif // ENABLE_GIZMOS_ON_TOP
                         m_moving = true;
                     }
                 }
diff --git a/src/slic3r/GUI/GLCanvas3D.hpp b/src/slic3r/GUI/GLCanvas3D.hpp
index 3d6f0da175..fdc3b40083 100644
--- a/src/slic3r/GUI/GLCanvas3D.hpp
+++ b/src/slic3r/GUI/GLCanvas3D.hpp
@@ -324,9 +324,7 @@ class GLCanvas3D
         bool dragging;
         bool left_down;
         Vec2d position;
-#if ENABLE_GIZMOS_ON_TOP
         Vec3d scene_position;
-#endif // ENABLE_GIZMOS_ON_TOP
         Drag drag;
 
         Mouse();
diff --git a/src/slic3r/GUI/GLGizmo.cpp b/src/slic3r/GUI/GLGizmo.cpp
index e38345220c..bc00de23c0 100644
--- a/src/slic3r/GUI/GLGizmo.cpp
+++ b/src/slic3r/GUI/GLGizmo.cpp
@@ -760,9 +760,7 @@ void GLGizmoRotate3D::on_stop_dragging()
 
 void GLGizmoRotate3D::on_render(const GLCanvas3D::Selection& selection) const
 {
-#if ENABLE_GIZMOS_ON_TOP
     ::glClear(GL_DEPTH_BUFFER_BIT);
-#endif // ENABLE_GIZMOS_ON_TOP
 
     if ((m_hover_id == -1) || (m_hover_id == 0))
         m_gizmos[X].render(selection);
@@ -899,9 +897,7 @@ void GLGizmoScale3D::on_render(const GLCanvas3D::Selection& selection) const
         ((m_hover_id == 6) || (m_hover_id == 7) || (m_hover_id == 8) || (m_hover_id == 9)))
         set_tooltip("X/Y/Z");
 
-#if ENABLE_GIZMOS_ON_TOP
     ::glClear(GL_DEPTH_BUFFER_BIT);
-#endif // ENABLE_GIZMOS_ON_TOP
     ::glEnable(GL_DEPTH_TEST);
 
     BoundingBoxf3 box;
@@ -1264,9 +1260,7 @@ void GLGizmoMove3D::on_render(const GLCanvas3D::Selection& selection) const
     else if (!m_grabbers[2].dragging && (m_hover_id == 2))
         set_tooltip("Z");
 
-#if ENABLE_GIZMOS_ON_TOP
     ::glClear(GL_DEPTH_BUFFER_BIT);
-#endif // ENABLE_GIZMOS_ON_TOP
     ::glEnable(GL_DEPTH_TEST);
 
     const BoundingBoxf3& box = selection.get_bounding_box();
@@ -1464,9 +1458,7 @@ void GLGizmoFlatten::on_start_dragging(const GLCanvas3D::Selection& selection)
 
 void GLGizmoFlatten::on_render(const GLCanvas3D::Selection& selection) const
 {
-#if ENABLE_GIZMOS_ON_TOP
     ::glClear(GL_DEPTH_BUFFER_BIT);
-#endif // ENABLE_GIZMOS_ON_TOP
 
     ::glEnable(GL_DEPTH_TEST);
     ::glEnable(GL_BLEND);