diff --git a/htdocs/core/class/html.formticket.class.php b/htdocs/core/class/html.formticket.class.php
index 5600f51f5e2..31a48f38cf4 100644
--- a/htdocs/core/class/html.formticket.class.php
+++ b/htdocs/core/class/html.formticket.class.php
@@ -346,7 +346,7 @@ class FormTicket
 			}
 		}
 
-		if ($conf->knowledgemanagement->enabled) {
+		if (!empty($conf->knowledgemanagement->enabled)) {
 			// KM Articles
 			print '<tr id="KWwithajax"></tr>';
 			print '<!-- Script to manage change of ticket group -->