diff --git a/Filer-Server-API.md b/Filer-Server-API.md
index b4fd08d..3803a57 100644
--- a/Filer-Server-API.md
+++ b/Filer-Server-API.md
@@ -82,4 +82,7 @@ curl  "http://localhost:8888/javascript/?pretty=y&lastFileName=new_name.js&limit
 // recursively delete everything, ignoring any recursive error
 > curl -X DELETE http://localhost:8888/path/to/dir?recursive=true&ignoreRecursiveError=true
 
+// For Experts Only: remove filer directories only, without removing data chunks. 
+// see https://github.com/chrislusf/seaweedfs/pull/1153
+> curl -X DELETE http://localhost:8888/path/to?recursive=true&shouldDeleteChunks=true
 ```