diff --git a/components/cache/adapters/chain_adapter.rst b/components/cache/adapters/chain_adapter.rst
index 4a13491f6e2..516c49bd802 100644
--- a/components/cache/adapters/chain_adapter.rst
+++ b/components/cache/adapters/chain_adapter.rst
@@ -58,10 +58,10 @@ incompatible adapters are silently ignored::
         new FilesystemAdapter(),  // DOES implement PruneableInterface
     ]);
 
-    // prune will proxy the call to FilesystemAdapter while silently skipping ApcuAdapter
+    // prune will proxy the call to FilesystemAdapter while silently skip ApcuAdapter
     $cache->prune();
 
-.. note::
+.. versionadded:: 3.4
 
     Since Symfony 3.4, this adapter implements :class:`Symfony\\Component\\Cache\\PruneableInterface`,
     allowing for manual :ref:`pruning of expired cache entries <component-cache-cache-pool-prune>` by