diff --git a/CHANGELOG.md b/CHANGELOG.md
index a654d7dd..9bfa8673 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - ES-CL: the ITACyL server is https-only, the 2025 shapefiles sit in province subfolders, and C_REFREC is the identifier
 - A test refuses a fixture above 5 MB, committed or merely lying in the fixture folder, because a failing convert test downloads the real source there
 - ES-MD: find RECINTO.shp wherever the archive puts it
+- ES-AN: CD_USO is the land-use column, with the determination date from the variant year
 - Update vecorel-cli to v0.2.17:
   - GeoJSON is read as UTF-8 as the format mandates, instead of the platform locale (cp1252 on Windows mangled umlauts)
   - GeoJSON files with a byte order mark no longer fail to read
diff --git a/fiboa_cli/datasets/es_an.py b/fiboa_cli/datasets/es_an.py
index b484f3a0..6fcf1fa9 100644
--- a/fiboa_cli/datasets/es_an.py
+++ b/fiboa_cli/datasets/es_an.py
@@ -45,11 +45,13 @@ class ANConverter(ESBaseConverter):
         "crop:name_en": "crop:name_en",
     }
 
+    use_code_attribute = "CD_USO"
     area_is_in_ha = False
     area_calculate_missing = True
+    use_variant_as_determination = True
 
-    column_additions = ESBaseConverter.column_additions | {
-        "determination:datetime": "2024-03-28T00:00:00Z",
+    column_migrations = {
+        "ID_RECINTO": lambda col: col.astype("int64"),
     }
 
     missing_schemas = {
diff --git a/tests/data-files/convert/es_an/SP25_REC_PROV_04.zip b/tests/data-files/convert/es_an/SP25_REC_PROV_04.zip
new file mode 100644
index 00000000..6b3b2e42
Binary files /dev/null and b/tests/data-files/convert/es_an/SP25_REC_PROV_04.zip differ
diff --git a/tests/test_convert.py b/tests/test_convert.py
index d3ce8c7e..fd8ee1ff 100644
--- a/tests/test_convert.py
+++ b/tests/test_convert.py
@@ -45,6 +45,7 @@
     "ie",
     "es_cat",
     "es_cl",
+    "es_an",
     "es",
     "nz",
     "lt",
@@ -83,6 +84,10 @@ def _input_files(converter, *names):
         "variant": "2025",
         "input_files": {f"{test_path}/es_cl/AVILA.zip": ["replaceme.zip"]},
     },
+    "es_an": {
+        "variant": "2025",
+        "input_files": {f"{test_path}/es_an/SP25_REC_PROV_04.zip": ["SP25_REC_04.shp"]},
+    },
     "es_cat": _input_files("es_cat", "Cultius_DUN2023_GPKG.zip"),
     "es": {"input_files": {f"{test_path}/es/1501_ALAVA_cd_2025_20250105.gpkg.zip": ["*.gpkg"]}},
     "lv": _input_files("lv", "1_100.xml"),