diff --git a/docs/src/main/sphinx/functions/aggregate.rst b/docs/src/main/sphinx/functions/aggregate.rst
index 821395721e29..78a6756e5b87 100644
--- a/docs/src/main/sphinx/functions/aggregate.rst
+++ b/docs/src/main/sphinx/functions/aggregate.rst
@@ -483,7 +483,8 @@ Statistical aggregate functions
 
 .. function:: skewness(x) -> double
 
-    Returns the skewness of all input values.
+    Returns the Fisher’s moment coefficient of `skewness
+    <https://wikipedia.org/wiki/Skewness>`_ of all input values.
 
 .. function:: stddev(x) -> double