diff --git a/src/ctapipe_io_lst/__init__.py b/src/ctapipe_io_lst/__init__.py
index b77dc64a..ba54bf57 100644
--- a/src/ctapipe_io_lst/__init__.py
+++ b/src/ctapipe_io_lst/__init__.py
@@ -929,6 +929,9 @@ def fill_trigger_info(self, array_event):
         if trigger.event_type == EventType.UNKNOWN:
             self.log.warning(f'Event {array_event.index.event_id} has unknown event type, trigger: {trigger_bits:08b}')
 
+        if CTAPIPE_0_20:
+            array_event.r1[tel_id].event_type = trigger.event_type
+
     def tag_flatfield_events(self, array_event):
         '''
         Use a heuristic based on R1 waveforms to recognize flat field events
diff --git a/src/ctapipe_io_lst/tests/test_lsteventsource.py b/src/ctapipe_io_lst/tests/test_lsteventsource.py
index 63ed6292..337abe07 100644
--- a/src/ctapipe_io_lst/tests/test_lsteventsource.py
+++ b/src/ctapipe_io_lst/tests/test_lsteventsource.py
@@ -318,8 +318,7 @@ def test_pedestal_events(tmp_path):
                 assert event.trigger.event_type == EventType.SKY_PEDESTAL
             else:
                 assert event.trigger.event_type != EventType.SKY_PEDESTAL
-
-
+            assert event.r1.tel[1].event_type == event.trigger.event_type
 
 
 @pytest.mark.parametrize(