diff --git a/system/src/Grav/Common/Twig/Extension/FilesystemExtension.php b/system/src/Grav/Common/Twig/Extension/FilesystemExtension.php
index 9b9085558..6e5434c4e 100644
--- a/system/src/Grav/Common/Twig/Extension/FilesystemExtension.php
+++ b/system/src/Grav/Common/Twig/Extension/FilesystemExtension.php
@@ -283,7 +283,7 @@ class FilesystemExtension extends AbstractExtension
 
     /**
      * @param string $filename
-     * @return string|false
+     * @return int|false
      */
     public function exif_imagetype($filename)
     {