diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index c86ca594ca..9a43ca1185 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -3658,9 +3658,7 @@ void GLCanvas3D::_refresh_if_shown_on_screen()
 
 void GLCanvas3D::_picking_pass() const
 {
-    const Vec2d& pos = m_mouse.position;
-
-    if (m_picking_enabled && !m_mouse.dragging && (pos != Vec2d(DBL_MAX, DBL_MAX)))
+    if (m_picking_enabled && !m_mouse.dragging && (m_mouse.position != Vec2d(DBL_MAX, DBL_MAX)))
     {
         m_hover_volume_idxs.clear();
 
@@ -3694,10 +3692,10 @@ void GLCanvas3D::_picking_pass() const
 
         GLubyte color[4] = { 0, 0, 0, 0 };
         const Size& cnv_size = get_canvas_size();
-        bool inside = (0 <= pos(0)) && (pos(0) < cnv_size.get_width()) && (0 <= pos(1)) && (pos(1) < cnv_size.get_height());
+        bool inside = (0 <= m_mouse.position(0)) && (m_mouse.position(0) < cnv_size.get_width()) && (0 <= m_mouse.position(1)) && (m_mouse.position(1) < cnv_size.get_height());
         if (inside)
         {
-            glsafe(::glReadPixels(pos(0), cnv_size.get_height() - pos(1) - 1, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, (void*)color));
+            glsafe(::glReadPixels(m_mouse.position(0), cnv_size.get_height() - m_mouse.position(1) - 1, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, (void*)color));
             volume_id = color[0] + (color[1] << 8) + (color[2] << 16);
         }
         if ((0 <= volume_id) && (volume_id < (int)m_volumes.volumes.size()))