diff --git a/docs/03.reference/01.functions/datediff/_arguments/datepart.md b/docs/03.reference/01.functions/datediff/_arguments/datepart.md
index ff1b2dc45..2fd993ba2 100644
--- a/docs/03.reference/01.functions/datediff/_arguments/datepart.md
+++ b/docs/03.reference/01.functions/datediff/_arguments/datepart.md
@@ -11,3 +11,4 @@ The specific units in which to count:
 - h: Hours
 - n: Minutes
 - s: Seconds
+- l: MilliSeconds