diff --git a/htdocs/compta/stats/cabyprodserv.php b/htdocs/compta/stats/cabyprodserv.php
index 485a6088338..46908ac6b75 100644
--- a/htdocs/compta/stats/cabyprodserv.php
+++ b/htdocs/compta/stats/cabyprodserv.php
@@ -232,7 +232,7 @@ if ($modecompta == 'CREANCES-DETTES')
 	if ($selected_cat === -2) {	// Without any category
 		$sql .= " LEFT JOIN ".MAIN_DB_PREFIX."categorie_product as cp ON p.rowid = cp.fk_product";
 	} elseif ($selected_cat) { 	// Into a specific category
-		$sql .= ", ".MAIN_DB_PREFIX."categorie as c, ".MAIN_DB_PREFIX."categorie_product as cp";
+		$sql .= " INNER JOIN ".MAIN_DB_PREFIX."categorie_product as cp ON (cp.fk_product = p.rowid) INNER JOIN ".MAIN_DB_PREFIX."categorie as c ON (cp.fk_categorie = c.rowid)";
 	}
 	$sql .= " WHERE l.fk_facture = f.rowid";
 	$sql .= " AND f.fk_statut in (1,2)";