diff --git a/setup.go b/setup.go
index 16b26235..7b32c326 100644
--- a/setup.go
+++ b/setup.go
@@ -24,7 +24,7 @@ func setup(c *caddy.Controller) error {
 		return err
 	}
 
-	httpserver.GetConfig(c.Key).AddMiddleware(func(next httpserver.Handler) httpserver.Handler {
+	httpserver.GetConfig(c).AddMiddleware(func(next httpserver.Handler) httpserver.Handler {
 		return FileManager{Configs: configs, Next: next}
 	})