diff --git a/drupal/sites/all/modules/opengraph_meta/opengraph_meta.common.inc b/drupal/sites/all/modules/opengraph_meta/opengraph_meta.common.inc
index 165ab11..6c76154 100644
--- a/drupal/sites/all/modules/opengraph_meta/opengraph_meta.common.inc
+++ b/drupal/sites/all/modules/opengraph_meta/opengraph_meta.common.inc
@@ -486,7 +486,7 @@ class OpenGraphMetaDrupalLayer {
     switch (OPENGRAPH_META_DRUPAL_VERSION) {
       case 6:
         $cck_content_type_id = OPENGRAPH_META_VAR_CONTENT_TYPE_CCK_.$type_id;
-        if (array_key_exists($cck_content_type_id, $form_values['description_cck']))
+        if (isset($form_values['description_cck']) && array_key_exists($cck_content_type_id, $form_values['description_cck']))
           variable_set($cck_content_type_id, $form_values['description_cck'][$cck_content_type_id]);
       default:
         $content_type_id = OPENGRAPH_META_VAR_CONTENT_TYPE_.$type_id;