diff --git a/src/Mod/Fem/femobjects/FemConstraint.py b/src/Mod/Fem/femobjects/FemConstraint.py
index 3adc69d944..2a9cc1ac08 100644
--- a/src/Mod/Fem/femobjects/FemConstraint.py
+++ b/src/Mod/Fem/femobjects/FemConstraint.py
@@ -32,6 +32,7 @@ class Proxy(object):
     BaseType = "Fem::ConstraintPython"
 
     def __init__(self, obj):
+        self.Object = obj  # keep a ref to the DocObj for nonGui usage
         obj.Proxy = self  # link between App::DocumentObject to this object
 
 ##  @}