diff --git a/htdocs/adherents/class/adherentstats.class.php b/htdocs/adherents/class/adherentstats.class.php
index 62d0e03e27e..e042331b9eb 100644
--- a/htdocs/adherents/class/adherentstats.class.php
+++ b/htdocs/adherents/class/adherentstats.class.php
@@ -92,7 +92,7 @@ class AdherentStats extends Stats
 		$sql = "SELECT date_format(p.dateadh,'%m') as dm, count(*)";
 		$sql .= " FROM ".$this->from;
 		//if (!$user->rights->societe->client->voir && !$user->socid) $sql.= ", ".MAIN_DB_PREFIX."societe_commerciaux as sc";
-		$sql .= " WHERE date_format(p.dateadh,'%Y') = ".((int) $year);
+		$sql .= " WHERE date_format(p.dateadh,'%Y') = '".((int) $year)."'";
 		$sql .= " AND ".$this->where;
 		$sql .= " GROUP BY dm";
 		$sql .= $this->db->order('dm', 'DESC');
@@ -133,7 +133,7 @@ class AdherentStats extends Stats
 		$sql = "SELECT date_format(p.dateadh,'%m') as dm, sum(p.".$this->field.")";
 		$sql .= " FROM ".$this->from;
 		//if (!$user->rights->societe->client->voir && !$user->socid) $sql.= ", ".MAIN_DB_PREFIX."societe_commerciaux as sc";
-		$sql .= " WHERE date_format(p.dateadh,'%Y') = ".((int) $year);
+		$sql .= " WHERE date_format(p.dateadh,'%Y') = '".((int) $year)."'";
 		$sql .= " AND ".$this->where;
 		$sql .= " GROUP BY dm";
 		$sql .= $this->db->order('dm', 'DESC');
@@ -154,7 +154,7 @@ class AdherentStats extends Stats
 		$sql = "SELECT date_format(p.dateadh,'%m') as dm, avg(p.".$this->field.")";
 		$sql .= " FROM ".$this->from;
 		//if (!$user->rights->societe->client->voir && !$this->socid) $sql.= ", ".MAIN_DB_PREFIX."societe_commerciaux as sc";
-		$sql .= " WHERE date_format(p.dateadh,'%Y') = ".((int) $year);
+		$sql .= " WHERE date_format(p.dateadh,'%Y') = '".((int) $year)."'";
 		$sql .= " AND ".$this->where;
 		$sql .= " GROUP BY dm";
 		$sql .= $this->db->order('dm', 'DESC');