diff --git a/bindings/pyroot_experimental/PyROOT/src/TClonesArrayPyz.cxx b/bindings/pyroot_experimental/PyROOT/src/TClonesArrayPyz.cxx
index 09888a4af6447d5ca8f1a718988e6bf5c4ff15ee..112c5d1c4aa544935dcf7b8ed102c1d6489f637a 100644
--- a/bindings/pyroot_experimental/PyROOT/src/TClonesArrayPyz.cxx
+++ b/bindings/pyroot_experimental/PyROOT/src/TClonesArrayPyz.cxx
@@ -83,6 +83,7 @@ static PyObject *PyStyleIndex(PyObject *self, PyObject *index)
       pyindex = PyLong_FromSsize_t(size + idx);
    }
 
+   // We transfer ownership to the caller, who needs to decref
    return pyindex;
 }