diff --git a/htdocs/core/class/html.formmail.class.php b/htdocs/core/class/html.formmail.class.php
index 6a4d25f0a59..83ed58d71ce 100644
--- a/htdocs/core/class/html.formmail.class.php
+++ b/htdocs/core/class/html.formmail.class.php
@@ -325,7 +325,7 @@ class FormMail extends Form
         $langs->loadLangs(array('other', 'mails'));
 
 		// Clear temp files. Must be done at beginning, before call of triggers
-		if (GETPOST('mode', 'alpha') == 'init' || (GETPOST('modelmailselected', 'alpha') && GETPOST('modelmailselected', 'alpha') != '-1'))
+		if (GETPOST('mode', 'alpha') == 'init' || (GETPOST('modelselected') && GETPOST('modelmailselected', 'alpha') && GETPOST('modelmailselected', 'alpha') != '-1'))
 		{
 			$this->clear_attached_files();
 		}