diff --git a/classes/prettyblocks/core/FieldCore.php b/classes/prettyblocks/core/FieldCore.php
index 5372f1de..2c90595f 100644
--- a/classes/prettyblocks/core/FieldCore.php
+++ b/classes/prettyblocks/core/FieldCore.php
@@ -605,7 +605,7 @@ public function formatFieldSelectorForFront()
             return $this->_getCollection($idCollection, $this->collection);
         }
         // if value doesn't exists in DB and new value is set
-        if ($this->force_default_value && $this->new_value == '') {
+        if ($this->force_default_value && $this->new_value === '' && is_array($this->default) && isset($this->default['show']['id'])) {
             $idCollection = (int) $this->default['show']['id'];
 
             return $this->_getCollection($idCollection, $this->collection);