diff --git a/examples/python3/NeedleInsertion.py b/examples/python3/NeedleInsertion.py
index 391914a8..9d614381 100644
--- a/examples/python3/NeedleInsertion.py
+++ b/examples/python3/NeedleInsertion.py
@@ -9,7 +9,7 @@
 from cosserat.usefulFunctions import pluginList
 from cosserat.createFemRegularGrid import createFemCubeWithParams
 from cosserat.cosseratObject import Cosserat
-from cosserat.utils import addConstraintPoint
+from useful.utils import addConstraintPoint
 import sys
 
 # params = NeedleParameters()
@@ -57,10 +57,9 @@ def createScene(rootNode):
     solverNode.addObject('SparseLDLSolver', name='solver', template="CompressedRowSparseMatrixd")
     solverNode.addObject('GenericConstraintCorrection')
 
-    needle = solverNode.addChild(
-        Cosserat(parent=solverNode, cosseratGeometry=needleGeometryConfig, radius=GeometryParams.radius,
-                 name="needle", youngModulus=PhysicsParams.youngModulus, poissonRatio=PhysicsParams.poissonRatio,
-                 rayleighStiffness=PhysicsParams.rayleighStiffness))
+    needle = Cosserat(parent=solverNode, cosseratGeometry=needleGeometryConfig, radius=GeometryParams.radius,
+        name="needle", youngModulus=PhysicsParams.youngModulus, poissonRatio=PhysicsParams.poissonRatio,
+        rayleighStiffness=PhysicsParams.rayleighStiffness)
     needleCollisionModel = needle.addPointCollisionModel("needleCollision")
 
     # These state is mapped on the needle and used to compute the distance between the needle and the
diff --git a/examples/python3/cosserat/needle/needleController.py b/examples/python3/cosserat/needle/needleController.py
index 648573ee..0c029391 100644
--- a/examples/python3/cosserat/needle/needleController.py
+++ b/examples/python3/cosserat/needle/needleController.py
@@ -10,7 +10,7 @@
 import Sofa
 import Cosserat
 from cosserat.needle.params import ConstraintsParams
-from cosserat.utils import computePositiveAlongXDistanceBetweenPoints, computeNegativeAlongXDistanceBetweenPoints
+from useful.utils import computePositiveAlongXDistanceBetweenPoints, computeNegativeAlongXDistanceBetweenPoints
 
 
 class Animation(Sofa.Core.Controller):