diff --git a/py/orbit/errors/ErrorLatticeModifications.py b/py/orbit/errors/ErrorLatticeModifications.py
index 51f786b4..cbcdef20 100644
--- a/py/orbit/errors/ErrorLatticeModifications.py
+++ b/py/orbit/errors/ErrorLatticeModifications.py
@@ -100,7 +100,7 @@ def addErrorNodeAsChild(lattice, AccNode, Error_Node):
 
 
 def addErrorNodeAsChild_I(lattice, AccNode, Error_Node):
-    AccNode.addChildNode(Error_Node, AccNode.ENTRANCE)
+    AccNode.getChildNodes(AccNode.ENTRANCE).insert(0, Error_Node)
     lattice.initialize()