diff --git a/plugins/inputs/nginx/README.md b/plugins/inputs/nginx/README.md
index 8c64f6311..918ee08ad 100644
--- a/plugins/inputs/nginx/README.md
+++ b/plugins/inputs/nginx/README.md
@@ -18,6 +18,7 @@
     - reading
     - requests
     - waiting
+    - writing
 
 ### Tags: