diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index 86d9f46b8c3..7a9da4e34a5 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -1807,7 +1807,7 @@ class ExtraFields
 						}
 					}
 				}
-				$value = '<div class="select2-container-multi-dolibarr" style="width: 90%;"><ul class="select2-choices-dolibarr">'.implode(' ', $toprint).'</ul></div>';
+				if (!empty($toprint)) $value = '<div class="select2-container-multi-dolibarr" style="width: 90%;"><ul class="select2-choices-dolibarr">'.implode(' ', $toprint).'</ul></div>';
 			} else {
 				dol_syslog(get_class($this).'::showOutputField error '.$this->db->lasterror(), LOG_WARNING);
 			}