diff --git a/src/Mod/Path/PathScripts/PathProfileContour.py b/src/Mod/Path/PathScripts/PathProfileContour.py
index 5cea86f83c..d0912a2602 100644
--- a/src/Mod/Path/PathScripts/PathProfileContour.py
+++ b/src/Mod/Path/PathScripts/PathProfileContour.py
@@ -102,6 +102,8 @@ class ObjectContour(PathProfileBase.ObjectProfile):
         return params
 
     def updateDepths(self, obj, ignoreErrors=False):
+        if not hasattr(self, 'stock'):
+            self.stock = self.getJob(obj).Stock
         stockBB = self.stock.Shape.BoundBox
         obj.OpFinalDepth = stockBB.ZMin
         obj.OpStartDepth = stockBB.ZMax