diff --git a/src/Mod/Path/PathScripts/PostUtils.py b/src/Mod/Path/PathScripts/PostUtils.py
index 423e426b5076..6377faead5be 100644
--- a/src/Mod/Path/PathScripts/PostUtils.py
+++ b/src/Mod/Path/PathScripts/PostUtils.py
@@ -27,9 +27,12 @@
 '''
 
 from PySide import QtCore, QtGui
-import FreeCADGui
 import FreeCAD
 
+FreeCADGui = None
+if FreeCAD.GuiUp:
+    import FreeCADGui
+
 class OldHighlighter(QtGui.QSyntaxHighlighter):
     def highlightBlock(self, text):
         myClassFormat = QtGui.QTextCharFormat()
@@ -76,7 +79,9 @@ def highlightBlock(self, text):
 
 
 class GCodeEditorDialog(QtGui.QDialog):
-    def __init__(self, parent = FreeCADGui.getMainWindow()):
+    def __init__(self, parent = None):
+        if parent is None:
+            parent = FreeCADGui.getMainWindow()
         QtGui.QDialog.__init__(self,parent)
 
         layout = QtGui.QVBoxLayout(self)