diff --git a/python/docs/source/reference/pyspark.sql.rst b/python/docs/source/reference/pyspark.sql.rst
index 605a1504e498..7653ce473580 100644
--- a/python/docs/source/reference/pyspark.sql.rst
+++ b/python/docs/source/reference/pyspark.sql.rst
@@ -385,6 +385,7 @@ Functions
     corr
     cos
     cosh
+    cot
     count
     count_distinct
     countDistinct