diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index c89fc593745..bd1daca8886 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -1681,7 +1681,7 @@ class ExtraFields
 					// Clean parameters
 					$value_key=dol_mktime($_POST[$keysuffix."options_".$key.$keyprefix."hour"], $_POST[$keysuffix."options_".$key.$keyprefix."min"], 0, $_POST[$keysuffix."options_".$key.$keyprefix."month"], $_POST[$keysuffix."options_".$key.$keyprefix."day"], $_POST[$keysuffix."options_".$key.$keyprefix."year"]);
 				}
-				else if (in_array($key_type,array('checkbox')))
+				else if (in_array($key_type,array('checkbox', 'chkbxlst')))
 				{
 					$value_arr=GETPOST($keysuffix."options_".$key.$keyprefix);
 					// Make sure we get an array even if there's only one checkbox