diff --git a/phpBB/phpbb/storage/provider/local.php b/phpBB/phpbb/storage/provider/local.php
index 16e57608ae..370178cf47 100644
--- a/phpBB/phpbb/storage/provider/local.php
+++ b/phpBB/phpbb/storage/provider/local.php
@@ -30,4 +30,12 @@ class local implements provider_interface
 	{
 		return ['path'];
 	}
+
+	/**
+	 * {@inheritdoc}
+	 */
+	public function is_available()
+	{
+		return true;
+	}
 }
diff --git a/phpBB/phpbb/storage/provider/provider_interface.php b/phpBB/phpbb/storage/provider/provider_interface.php
index b832025508..d2e78d907f 100644
--- a/phpBB/phpbb/storage/provider/provider_interface.php
+++ b/phpBB/phpbb/storage/provider/provider_interface.php
@@ -28,4 +28,11 @@ interface provider_interface
 	 * @return array	Configuration keys
 	 */
 	public function get_options();
+
+	/**
+	 * Return true if the adapter is available.
+	 *
+	 * @return bool
+	 */
+	public function is_available();
 }