diff --git a/File.class.php b/File.class.php
index afd3c3a..d82c6cc 100644
--- a/File.class.php
+++ b/File.class.php
@@ -72,7 +72,7 @@ abstract class File
             $this->variants[$size] = new ImageVariant;
         } else {
             if (!is_object($this->variants[$size])) {
-                $this->variants[$size] = self::getInstance($this->variants[$size]);
+                $this->variants[$size] = ImageVariant::getInstance($this->variants[$size]);
             }
         }
         return $this->variants[$size];