diff --git a/lang/es/activitynames.php b/lang/es/activitynames.php
index f135f190977..66c21751743 100644
--- a/lang/es/activitynames.php
+++ b/lang/es/activitynames.php
@@ -1,6 +1,6 @@
 <?php /// $Id$
 
-$string['filtername'] = "Actividades auto-enlazadas";
+$string['filtername'] = 'Actividades auto-enlazadas';
 
 ?>