diff --git a/src/Symfony/Component/Lock/Store/MongoDbStore.php b/src/Symfony/Component/Lock/Store/MongoDbStore.php
index acbb96eff279f..92b4f5b84b822 100644
--- a/src/Symfony/Component/Lock/Store/MongoDbStore.php
+++ b/src/Symfony/Component/Lock/Store/MongoDbStore.php
@@ -130,7 +130,11 @@ public function __construct($mongo, array $options = [], float $initialTtl = 300
     }
 
     /**
-     * Extract default database and collection from given connection uri and remove collection querystring.
+     * Extract default database and collection from given connection URI and remove collection querystring.
+     *
+     * Non-standard parameters are removed from the URI to improve libmongoc's re-use of connections.
+     *
+     * @see https://www.php.net/manual/en/mongodb.connection-handling.php
      */
     private function skimUri(string $uri): string
     {