diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6d5d98dc..ad8059ce 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Clarified for various mathematical functions the defined input and output ranges. Mention that `NaN` is returned outside of the defined input range where possible.
 - `apply_polygon`: Replaced outdated usage of `raster-cube` subtype with `datacube` and dimensions. [#524](https://github.com/Open-EO/openeo-processes/issues/524)
 - `aggregate_spatial` and `load_geojson`: Dimensions must by of type `geometry`, not `geometries`
+- `aggregate_spatial`: Clarified that the output geometries are unchanged compared to the input geometries. [#499](https://github.com/Open-EO/openeo-processes/issues/499)
 - `aggregate_temporal` and `aggregate_temporal_period`: Clarified that the process throws a `DimensionNotAvailable` exception when no temporal dimension exists.
 - `aggregate_temporal_period`: Removed unused exception `DistinctDimensionLabelsRequired`
 - `aggregate_temporal_period`: Clarified that the definition of weeks follows ISO 8601
diff --git a/aggregate_spatial.json b/aggregate_spatial.json
index 10b3c346..c0aeb939 100644
--- a/aggregate_spatial.json
+++ b/aggregate_spatial.json
@@ -105,7 +105,7 @@
         }
     ],
     "returns": {
-        "description": "A vector data cube with the computed results. Empty geometries still exist but without any aggregated values (i.e. no-data). The spatial dimensions are replaced by a dimension of type 'geometry' and if `target_dimension` is not `null`, a new dimension is added.",
+        "description": "A vector data cube with the computed results. Empty geometries still exist but without any aggregated values (i.e. no-data). The spatial dimensions are replaced by a dimension of type 'geometry' and if `target_dimension` is not `null`, a new dimension is added. The dimension of type `geometry` is unchanged compared to the geometries provided through the parameter `geometries`, especially with regards to its labels (geometries) and reference system.",
         "schema": {
             "type": "object",
             "subtype": "datacube",