diff --git a/src/hpp/corbaserver/rbprm/anymal/robot.py b/src/hpp/corbaserver/rbprm/anymal/robot.py
index 4fd6113fa8d9b798bd4b3cfd323ca4c5983ced82..b89b40961d02020c38cdb6860cf9f44f497d3472 100644
--- a/src/hpp/corbaserver/rbprm/anymal/robot.py
+++ b/src/hpp/corbaserver/rbprm/anymal/robot.py
@@ -153,7 +153,7 @@ class Robot (Parent):
         self.RH_KFE_bounds = self.getJointBounds('RH_KFE')
 
     def loadAllLimbs(self,heuristic, analysis = None, nbSamples = nbSamples, octreeSize = octreeSize,disableEffectorCollision = False):
-        if isinstance(heuristic,basestring):#only one heuristic name given assign it to all the limbs
+        if isinstance(heuristic,str):#only one heuristic name given assign it to all the limbs
             dict_heuristic = {}
             for id in self.limbs_names:
                 dict_heuristic.update({id:heuristic})