diff --git a/include/pinocchio/serialization/joints-model.hpp b/include/pinocchio/serialization/joints-model.hpp
index ceef5f282..9f71101cb 100644
--- a/include/pinocchio/serialization/joints-model.hpp
+++ b/include/pinocchio/serialization/joints-model.hpp
@@ -83,7 +83,7 @@ namespace boost
     template<typename Scalar, int Options, template<typename S, int O> class JointCollectionTpl>
     class SetJointIndexes<pinocchio::JointModelMimicTpl<Scalar, Options, JointCollectionTpl>>
     {
-      pinocchio::JointModelMimicTpl<Scalar, Options, JointCollectionTpl> & joint;
+      // pinocchio::JointModelMimicTpl<Scalar, Options, JointCollectionTpl> & joint;
 
     public:
       explicit SetJointIndexes(