diff --git a/passerelle/apps/atal_rest/models.py b/passerelle/apps/atal_rest/models.py
index adf45d9b..5f4b7523 100644
--- a/passerelle/apps/atal_rest/models.py
+++ b/passerelle/apps/atal_rest/models.py
@@ -491,6 +491,7 @@ class AtalREST(BaseResource, HTTPResource):
         },
     )
     def worksrequest_intervention_status(self, request, number):
-        resp_data = self._call('/api/WorksRequests/GetInterventionStates', params={'number': number})[0]
+        resp_data = self._call('/api/WorksRequests/GetInterventionStates', params={'number': number})
+        resp_data = resp_data[0] if resp_data else {}
         resp_data['WorkStateLabel'] = INTERVENTION_STATUS_MAP.get(resp_data.get('WorkState', ''), '')
         return {'data': resp_data}
diff --git a/tests/test_atal_rest.py b/tests/test_atal_rest.py
index 0faf456b..2fef4b79 100644
--- a/tests/test_atal_rest.py
+++ b/tests/test_atal_rest.py
@@ -93,6 +93,19 @@ def test_worksrequest_intervention_status(app, connector):
         assert json_resp['data']['WorkStateLabel'] == 'En cours'
 
 
+def test_worksrequest_intervention_status_empty_list(app, connector):
+    with responses.RequestsMock() as rsps:
+        rsps.get(
+            'https://atal.invalid/api/WorksRequests/GetInterventionStates',
+            status=200,
+            json=[],
+        )
+        resp = app.get('/atal-rest/test/worksrequest-intervention-status?number=DIT23070011')
+        json_resp = resp.json
+        assert json_resp['err'] == 0
+        assert json_resp['data'] == {'WorkStateLabel': ''}
+
+
 def test_worksrequests_single_attachment(app, connector):
     with responses.RequestsMock() as rsps:
         rsps.post('https://atal.invalid/api/WorksRequests/1/Attachments', status=200, body=b'')