diff --git a/examples/thematicalDocs/T4-DirectActuation/Actuators/Pneumatic/SurfaceConstraintPressure.py b/examples/thematicalDocs/T4-DirectActuation/Actuators/Pneumatic/SurfaceConstraintPressure.py
index 5f6ac893..726ea218 100644
--- a/examples/thematicalDocs/T4-DirectActuation/Actuators/Pneumatic/SurfaceConstraintPressure.py
+++ b/examples/thematicalDocs/T4-DirectActuation/Actuators/Pneumatic/SurfaceConstraintPressure.py
@@ -36,7 +36,7 @@ def createScene(rootNode):
 
     # bunny/cavity
     cavity = bunny.addChild('cavity')
-    cavity.addObject('MeshObjLoader', name='loader', filename=path + 'Hollow_Bunny_Body_Cavity.obj')
+    cavity.addObject('MeshOBJLoader', name='loader', filename=path + 'Hollow_Bunny_Body_Cavity.obj')
     cavity.addObject('MeshTopology', src='@loader', name='topo')
     cavity.addObject('MechanicalObject', name='cavity')
     cavity.addObject('SurfacePressureConstraint', name='surfaceConstraint', triangles='@topo.triangles', value=0,
diff --git a/python3/softrobots/inverse/actuators/pneumatic.py b/python3/softrobots/inverse/actuators/pneumatic.py
index c325d12b..9961b7a6 100644
--- a/python3/softrobots/inverse/actuators/pneumatic.py
+++ b/python3/softrobots/inverse/actuators/pneumatic.py
@@ -56,7 +56,7 @@ def PneumaticCavity(surfaceMeshFileName=None,
     if surfaceMeshFileName.endswith(".stl"):
         pneumatic.addObject('MeshSTLLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
     elif surfaceMeshFileName.endswith(".obj"):
-        pneumatic.addObject('MeshObjLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
+        pneumatic.addObject('MeshOBJLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
     else :
         Sofa.msg_error("Your surfaceMeshFileName extension is not the right one, you have to give a surfacic mesh with .stl or .obj extension")
         return None
diff --git a/python3/softrobots/inverse/effectors/volumeEffector.py b/python3/softrobots/inverse/effectors/volumeEffector.py
index e00f6e6c..59eab764 100644
--- a/python3/softrobots/inverse/effectors/volumeEffector.py
+++ b/python3/softrobots/inverse/effectors/volumeEffector.py
@@ -64,7 +64,7 @@ def VolumeEffector(surfaceMeshFileName=None,
     if surfaceMeshFileName.endswith(".stl"):
         veffector.addObject('MeshSTLLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
     elif surfaceMeshFileName.endswith(".obj"):
-        veffector.addObject('MeshObjLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
+        veffector.addObject('MeshOBJLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
     else :
         Sofa.msg_error("Your surfaceMeshFileName extension is not the right one, you have to give a surfacic mesh with .stl or .obj extension")
         return None
diff --git a/python3/softrobots/sensors/pneumaticSensor.py b/python3/softrobots/sensors/pneumaticSensor.py
index 1c6b099d..16ffaef3 100644
--- a/python3/softrobots/sensors/pneumaticSensor.py
+++ b/python3/softrobots/sensors/pneumaticSensor.py
@@ -65,7 +65,7 @@ def PneumaticSensor(surfaceMeshFileName=None,
     if surfaceMeshFileName.endswith(".stl"):
         PneumaticSensor.addObject('MeshSTLLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
     elif surfaceMeshFileName.endswith(".obj"):
-        PneumaticSensor.addObject('MeshObjLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
+        PneumaticSensor.addObject('MeshOBJLoader', name='MeshLoader', filename=surfaceMeshFileName, rotation=rotation, translation=translation, scale=uniformScale)
     else :
         Sofa.msg_error("Your surfaceMeshFileName extension is not the right one, you have to give a surfacic mesh with .stl or .obj extension")
         return None