diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 78a98f77c6e..f0f349bd3bd 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -4315,6 +4315,9 @@ abstract class CommonObject
 		if (empty($fk_object_where) || empty($field_where) || empty($table_element)) {
 			return -1;
 		}
+		if (!preg_match('/^[_a-zA-Z0-9]+$/', $field_select)) {
+			dol_syslog('Invalid value $field_select for parameter '.$field_select.' in call to getAllItemsLinkedByObjectID(). Must be a single field name.', LOG_ERR);
+		}
 
 		global $db;
 
@@ -4331,6 +4334,35 @@ abstract class CommonObject
 		return $TRes;
 	}
 
+	/**
+	 * Count items linked to an object id in association table
+	 *
+	 * @param	int		$fk_object_where		id of object we need to get linked items
+	 * @param	string	$field_where			name of field of object we need to get linked items
+	 * @param	string	$table_element			name of association table
+	 * @return 	array|int						Array of record, -1 if empty
+	 */
+	public static function getCountOfItemsLinkedByObjectID($fk_object_where, $field_where, $table_element)
+	{
+		if (empty($fk_object_where) || empty($field_where) || empty($table_element)) {
+			return -1;
+		}
+
+		global $db;
+
+		$sql = "SELECT COUNT(*) as nb FROM ".$db->prefix().$table_element." WHERE ".$field_where." = ".((int) $fk_object_where);
+		$resql = $db->query($sql);
+		$n = 0;
+		if ($resql) {
+			$res = $db->fetch_object($resql);
+			if ($res) {
+				$n = $res->nb;
+			}
+		}
+
+		return $n;
+	}
+
 	/**
 	 * Function used to remove all items linked to an object id in association table
 	 *
diff --git a/htdocs/core/lib/project.lib.php b/htdocs/core/lib/project.lib.php
index 43b2c136044..07519ea55d2 100644
--- a/htdocs/core/lib/project.lib.php
+++ b/htdocs/core/lib/project.lib.php
@@ -214,7 +214,7 @@ function project_prepare_head(Project $project, $moreparam = '')
 	if (isModEnabled('ticket') && $user->hasRight('ticket', 'read')) {
 		require_once DOL_DOCUMENT_ROOT.'/ticket/class/ticket.class.php';
 		$Tickettatic = new Ticket($db);
-		$nbTicket = count($Tickettatic->getAllItemsLinkedByObjectID($project->id, '*', 'fk_project', 'ticket'));
+		$nbTicket = $Tickettatic->getCountOfItemsLinkedByObjectID($project->id, 'fk_project', 'ticket');
 		$head[$h][0] = DOL_URL_ROOT.'/ticket/list.php?projectid='.((int) $project->id);
 		$head[$h][1] = $langs->trans("Ticket");
 		if ($nbTicket > 0) {