diff --git a/src/dynamic_graph/sot/dynamics_pinocchio/humanoid_robot.py b/src/dynamic_graph/sot/dynamics_pinocchio/humanoid_robot.py
index 9bcf38fd2c39402efae8f40a5642fdeded37cb13..52375b2c338361231719649192a0f18c1c6fcaaf 100755
--- a/src/dynamic_graph/sot/dynamics_pinocchio/humanoid_robot.py
+++ b/src/dynamic_graph/sot/dynamics_pinocchio/humanoid_robot.py
@@ -209,7 +209,7 @@ class AbstractHumanoidRobot (object):
 
     def initializeOpPoints(self):
         for op in self.OperationalPoints:
-            self.dynamic.createOpPoint(self.OperationalPointsMap[op], self.OperationalPointsMap[op])
+            self.dynamic.createOpPoint(op, self.OperationalPointsMap[op])
 
     def createFrame(self, frameName, transformation, operationalPoint):
         frame = OpPointModifier(frameName)