diff --git a/htdocs/resource/class/html.formresource.class.php b/htdocs/resource/class/html.formresource.class.php
index a8b17665fa1..99916b8ed70 100644
--- a/htdocs/resource/class/html.formresource.class.php
+++ b/htdocs/resource/class/html.formresource.class.php
@@ -224,8 +224,9 @@ class FormResource
 					$value = ($maxlength ?dol_trunc($arraytypes['label'], $maxlength) : $arraytypes['label']);
 				} elseif ($format == 3) {
 					$value = $arraytypes['code'];
+				} elseif (empty($value)) {
+					print  ' ';
 				}
-				print $value ? $value : ' ';
 				print '</option>';
 			}
 		}