diff --git a/docs/user-guide/user-defined-functions/user-defined-functions.md b/docs/user-guide/user-defined-functions/user-defined-functions.md
index 73782eaae8..7dd8a92a0e 100644
--- a/docs/user-guide/user-defined-functions/user-defined-functions.md
+++ b/docs/user-guide/user-defined-functions/user-defined-functions.md
@@ -10,4 +10,4 @@ container (user code) is through gRPC over Unix Domain Socket.
 There are two kinds of processing users can run
 
   - [Map](./map/map.md)
-  - [Reduce](./reduce/reduce.md) (Work in progress)
\ No newline at end of file
+  - [Reduce](./reduce/reduce.md)