diff --git a/inline_entity_form.module b/inline_entity_form.module
index d89344d..a514be1 100644
--- a/inline_entity_form.module
+++ b/inline_entity_form.module
@@ -1461,7 +1461,7 @@ function theme_inline_entity_form_entity_table($variables) {
     // Return the themed table.
     $table_attributes = array(
       'id' => $id,
-      'class' => 'ief-entity-table',
+      'class' => array('ief-entity-table'),
     );
     return theme('table', array('header' => $header, 'rows' => $rows, 'sticky' => FALSE, 'attributes' => $table_attributes));
   }