diff --git a/flexmeasures/api/v3_0/tests/test_sensors_api.py b/flexmeasures/api/v3_0/tests/test_sensors_api.py
index d67a3d219..7244be33e 100644
--- a/flexmeasures/api/v3_0/tests/test_sensors_api.py
+++ b/flexmeasures/api/v3_0/tests/test_sensors_api.py
@@ -127,7 +127,11 @@ def test_patch_sensor(client, setup_api_test_data):
 
 @pytest.mark.parametrize(
     "attribute, value",
-    [("generic_asset_id", 8), ("entity_address", "ea1.2025-01.io.flexmeasures:fm1.1")],
+    [
+        ("generic_asset_id", 8),
+        ("entity_address", "ea1.2025-01.io.flexmeasures:fm1.1"),
+        ("id", 7),
+    ],
 )
 def test_patch_sensor_for_excluded_attribute(
     client, setup_api_test_data, attribute, value
diff --git a/flexmeasures/data/schemas/sensors.py b/flexmeasures/data/schemas/sensors.py
index 5bb7d1421..2826e6413 100644
--- a/flexmeasures/data/schemas/sensors.py
+++ b/flexmeasures/data/schemas/sensors.py
@@ -26,6 +26,7 @@ class Meta:
             model = Asset
     """
 
+    id = ma.auto_field(dump_only=True)
     name = ma.auto_field(required=True)
     unit = ma.auto_field(required=True)
     timezone = ma.auto_field()