diff --git a/lib/private/Authentication/Token/IProvider.php b/lib/private/Authentication/Token/IProvider.php
index 6260555470..ce14a5880c 100644
--- a/lib/private/Authentication/Token/IProvider.php
+++ b/lib/private/Authentication/Token/IProvider.php
@@ -53,6 +53,8 @@ interface IProvider {
 	public function getToken($tokenId) ;
 
 	/**
+	 * Duplicate an existing session token
+	 *
 	 * @param string $oldSessionId
 	 * @param string $sessionId
 	 * @throws InvalidTokenException