diff --git a/src/Mod/CAM/Path/Main/Gui/SimulatorGL.py b/src/Mod/CAM/Path/Main/Gui/SimulatorGL.py
index be96af3d9e..0f90e3538c 100644
--- a/src/Mod/CAM/Path/Main/Gui/SimulatorGL.py
+++ b/src/Mod/CAM/Path/Main/Gui/SimulatorGL.py
@@ -32,7 +32,7 @@ import math
 import os
 
 from FreeCAD import Vector, Base
-from PySide2.QtWidgets import QDialogButtonBox
+from PySide.QtGui import QDialogButtonBox
 
 # lazily loaded modules
 from lazy_loader.lazy_loader import LazyLoader