struct pyrf_event {
        PyObject_HEAD
+       struct perf_evsel *evsel;
        struct perf_sample sample;
        union perf_event   event;
 };
        if (event != NULL) {
                PyObject *pyevent = pyrf_event__new(event);
                struct pyrf_event *pevent = (struct pyrf_event *)pyevent;
+               struct perf_evsel *evsel;
 
                if (pyevent == NULL)
                        return PyErr_NoMemory();
 
-               err = perf_evlist__parse_sample(evlist, event, &pevent->sample);
+               evsel = perf_evlist__event2evsel(evlist, event);
+               if (!evsel)
+                       return Py_None;
+
+               pevent->evsel = evsel;
+
+               err = perf_evsel__parse_sample(evsel, event, &pevent->sample);
 
                /* Consume the even only after we parsed it out. */
                perf_evlist__mmap_consume(evlist, cpu);