diff --git a/gravity-forms/gw-shortcode-attr-field-props.php b/gravity-forms/gw-shortcode-attr-field-props.php
index 0004f2fd..db381ba6 100644
--- a/gravity-forms/gw-shortcode-attr-field-props.php
+++ b/gravity-forms/gw-shortcode-attr-field-props.php
@@ -30,7 +30,8 @@
  */
 class GW_Shortcode_Attr_Field_Props {
 
-	private $_field_props;
+	private $_args        = array();
+	private $_field_props = array();
 
 	public function __construct( $args = array() ) {