diff --git a/docs/index.rst b/docs/index.rst
index 497040d40..ac062d7ce 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -149,8 +149,8 @@ Extending Scrapy
 :doc:`topics/spider-middleware`
     Customize the input and output of your spiders.
 
-:doc:`topics/scheduler-middleware`
-    Customize how pages are scheduled.
+:doc:`experimental/scheduler-middleware`
+    Customize how pages are scheduled (warning: experimental doc).
 
 :doc:`topics/extensions`
     Add any custom functionality using :doc:`signals <topics/signals>` and the