diff --git a/htdocs/core/boxes/box_members_by_tags.php b/htdocs/core/boxes/box_members_by_tags.php
index 196cec30738..d4e78f7efe9 100644
--- a/htdocs/core/boxes/box_members_by_tags.php
+++ b/htdocs/core/boxes/box_members_by_tags.php
@@ -90,7 +90,7 @@ class box_members_by_tags extends ModeleBoxes
 		$year = date('Y');
 		$numberyears = empty(getDolGlobalInt("MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH")) ? 2 : getDolGlobalInt("MAIN_NB_OF_YEAR_IN_WIDGET_GRAPH");
 
-		$this->info_box_head = array('text' => $langs->trans("BoxTitleMembersByTags").' ('.$year-$numberyears.' - '.$year.')');
+		$this->info_box_head = array('text' => $langs->trans("BoxTitleMembersByTags").' ('.($year - $numberyears).' - '.$year.')');
 
 		if ($user->rights->adherent->lire) {
 			require_once DOL_DOCUMENT_ROOT.'/adherents/class/adherentstats.class.php';