diff --git a/doc/discovery_functions.md b/doc/discovery_functions.md
index 697a163..b1b7c4f 100644
--- a/doc/discovery_functions.md
+++ b/doc/discovery_functions.md
@@ -242,7 +242,7 @@ filter_tags | Text[] | a list of filters.  Only geometries for which all of thes
 numer_id | Text | the ID of a numerator to check whether the geometry is valid against.  Will not reduce length of returned table, but will change values for `valid_numer` (optional)
 denom_id | Text | the ID of a denominator to check whether the geometry is valid against.  Will not reduce length of returned table, but will change values for `valid_denom` (optional)
 timespan | Text | the ID of a timespan to check whether the geometry is valid against.  Will not reduce length of returned table, but will change values for `valid_timespan` (optional)
-number_geometries | Integer | Number of geometries of the source data in order to calculate more accurately the score value to know which geometry fits better with the provided extent. (optional)
+number_geometries | Integer | an additional variable that is used to adjust the calculation of the [score](https://carto.com/docs/carto-engine/data/discovery-functions/#returns-4) (optional)
 
 #### Returns