diff --git a/openeo_driver/views.py b/openeo_driver/views.py
index b5a899b4..e6233a2a 100644
--- a/openeo_driver/views.py
+++ b/openeo_driver/views.py
@@ -669,6 +669,10 @@ def result(user: User):
             backend_implementation.request_costs(success=False, user=user, request_id=request_id)
             raise
 
+        # Add request id as "OpenEO-Identifier" like we do for batch jobs.
+        # TODO: follow-up standardization at https://github.com/Open-EO/openeo-api/pull/533
+        response.headers["OpenEO-Identifier"] = request_id
+
         return response
 
     @blueprint.route('/execute', methods=['POST'])
diff --git a/tests/test_views_execute.py b/tests/test_views_execute.py
index 6d82e4a9..1feaf92c 100644
--- a/tests/test_views_execute.py
+++ b/tests/test_views_execute.py
@@ -1,4 +1,5 @@
 import dataclasses
+import dirty_equals
 import json
 import math
 import re
@@ -4223,3 +4224,10 @@ def test_to_scl_dilation_mask_defaults(api, arguments, expected):
     args, kwargs = dummy.to_scl_dilation_mask.call_args
     assert args == ()
     assert kwargs == expected
+
+
+def test_synchronous_processing_response_header_openeo_identifier(api):
+    with mock.patch.object(FlaskRequestCorrelationIdLogging, "_build_request_id", return_value="r-abc123"):
+        res = api.result({"add1": {"process_id": "add", "arguments": {"x": 3, "y": 5}, "result": True}})
+    assert res.assert_status_code(200).json == 8
+    assert res.headers["OpenEO-Identifier"] == "r-abc123"