diff --git a/layers/landcover/mapping.yaml b/layers/landcover/mapping.yaml
index c0f06679..47071880 100644
--- a/layers/landcover/mapping.yaml
+++ b/layers/landcover/mapping.yaml
@@ -2,6 +2,8 @@ tables:
   # etldoc: imposm3 -> osm_landcover_polygon
   landcover_polygon:
     columns:
+    - name: osm_id
+      type: id
     - name: geometry
       type: validated_geometry
     - name: area