diff --git a/docs/ref/settings.rst b/docs/ref/settings.rst
index 6ab734489..d011f6c26 100644
--- a/docs/ref/settings.rst
+++ b/docs/ref/settings.rst
@@ -784,10 +784,9 @@ SCHEDULER_MIDDLEWARES_BASE
 
 Default:: 
 
-    [
-        'scrapy.contrib.schedulermiddleware.duplicatesfilter.DuplicatesFilterMiddleware',
-    ]
-
+    SCHEDULER_MIDDLEWARES_BASE = {
+        'scrapy.contrib.schedulermiddleware.duplicatesfilter.DuplicatesFilterMiddleware': 500,
+    }
 
 A dict containing the scheduler middlewares enabled by default in Scrapy. You
 should never modify this setting in your project, modify