diff --git a/field_collection.module b/field_collection.module
index c932a21..2455913 100644
--- a/field_collection.module
+++ b/field_collection.module
@@ -1059,6 +1059,14 @@ function field_collection_field_widget_form(&$form, &$form_state, $field, $insta
       if (field_collection_item_is_translatable()) {
         $element['#host_entity_type'] = $element['#entity_type'];
         $element['#host_entity'] = $element['#entity'];
+        // Give each field collection item a unique entity translation handler
+        // ID, otherwise an infinite loop occurs when adding values to nested
+        // field collection items.
+        if (!isset($field_collection_item->entity_translation_handler_id)) {
+          list($id, $revision_id) = entity_extract_ids('field_collection_item', $field_collection_item);
+          $revision_id = isset($revision_id) ? $revision_id : 0;
+          $field_collection_item->entity_translation_handler_id = 'field_collection_item' . '-' . (!empty($id) ? 'eid-' . $id . '-' . $revision_id : 'new-' . rand());
+        }
         $element['#field_collection_item'] = $field_collection_item;
         field_collection_add_child_translation_handler($element);
         // Ensure this is executed even with cached forms. This is mainly useful