diff --git a/docs/book/v3/naming-strategy/map-naming-strategy.md b/docs/book/v3/naming-strategy/map-naming-strategy.md
index 40087f92..d148c24b 100644
--- a/docs/book/v3/naming-strategy/map-naming-strategy.md
+++ b/docs/book/v3/naming-strategy/map-naming-strategy.md
@@ -44,7 +44,6 @@ echo $namingStrategy->hydrate('baz'); // outputs: bash
 
 ```php
 $namingStrategy = Laminas\Hydrator\NamingStrategy\MapNamingStrategy::createFromExtractionMap(
-    null, // no hydration map
     [
         'foo' => 'bar',
         'baz' => 'bash'