diff --git a/data-explorer/kusto/query/series-cosine-similarity-function.md b/data-explorer/kusto/query/series-cosine-similarity-function.md
index 5e5a98596c..24480baa83 100644
--- a/data-explorer/kusto/query/series-cosine-similarity-function.md
+++ b/data-explorer/kusto/query/series-cosine-similarity-function.md
@@ -15,7 +15,7 @@ The function `series_cosine_similarity()` takes two numeric series as input, and
 
 ## Syntax
 
-`series_cosine_similarity(`*series1*`,` *series2*`)`
+`series_cosine_similarity(`*series1*`, `*series2*`, [`*magnitude1`, [`*magnitude2`]])`
 
 [!INCLUDE [syntax-conventions-note](../includes/syntax-conventions-note.md)]
 
@@ -24,6 +24,7 @@ The function `series_cosine_similarity()` takes two numeric series as input, and
 | Name | Type | Required | Description |
 |--|--|--|--|
 | *series1, series2* | `dynamic` |   :heavy_check_mark: | Input arrays with numeric data. |
+| *magnitude1, magnitude2* | `real` |  | Optional magnitude of the first and the second vectors respectively. The magnitude is the square root of the dot product of the vector with itself. If the magnitude isn't provided, it will be calculated. |
 
 ## Returns