diff --git a/h5p.classes.php b/h5p.classes.php
index b17d33e..b73b788 100644
--- a/h5p.classes.php
+++ b/h5p.classes.php
@@ -280,7 +280,7 @@ class H5PValidator {
     'w' => '/^[0-9]{1,4}$/',
     'h' => '/^[0-9]{1,4}$/',
     'metaKeywords' => '/^.{1,}$/',
-    'metaDescription' => '/^.{1,}$/k',
+    'metaDescription' => '/^.{1,}$/',
   );
 
   // Schemas used to validate the library files