diff --git a/forms/class/forms.php b/forms/class/forms.php
index f849052..e2dfa1a 100644
--- a/forms/class/forms.php
+++ b/forms/class/forms.php
@@ -494,7 +494,7 @@ function _cleanvar($var)
 		 */
 		function _parse_tag_fld_post ($matches)
 		{
-			return $_POST['form-' . $this->form['alias_id']][$matches[1]];
+			return $_POST['form-' . $this->form['alias_id']][$matches[1]] ?? '';
 		}
 
 		/**
@@ -518,7 +518,7 @@ function _cleanvar($var)
 			$alias_id = $this->form['alias_id'];
 
 			$fld_val = $this->form['is_submited']
-				? $this->_stripslashes($_POST['form-' . $alias_id][$field_id])
+				? $this->_stripslashes($_POST['form-' . $alias_id][$field_id] ?? null)
 				: (in_array($field['type'],array('input','textarea'))
 					? $this->_eval2var('?>' . $field['defaultval'] . '<?')
 					: $field['defaultval']);