diff --git a/ctools/content_types/entity_view.inc b/ctools/content_types/entity_view.inc
index e505633..a21d256 100644
--- a/ctools/content_types/entity_view.inc
+++ b/ctools/content_types/entity_view.inc
@@ -28,7 +28,11 @@ function entity_entity_view_content_type_info($entity_type) {
  * Rendered entity use entity types machine name as subtype name.
  */
 function entity_entity_view_content_type_content_types() {
-  $types = array();
+  $types = &drupal_static(__FUNCTION__, array());
+  if (!empty($types)) {
+    return $types;
+  }
+
   $entities = entity_get_info();
 
   foreach ($entities as $entity_type => $info) {