diff --git a/htdocs/accountancy/class/bookkeeping.class.php b/htdocs/accountancy/class/bookkeeping.class.php
index ffb0a48e48b..f8a90cb0381 100644
--- a/htdocs/accountancy/class/bookkeeping.class.php
+++ b/htdocs/accountancy/class/bookkeeping.class.php
@@ -370,7 +370,7 @@ class BookKeeping extends CommonObject
 				$resqlnum = $this->db->query($sqlnum);
 				if ($resqlnum) {
 					$num = $this->db->num_rows($resqlnum);
-					if ($num>0) {
+					if ($num > 0) {
 						$objnum = $this->db->fetch_object($resqlnum);
 						$this->piece_num = $objnum->piece_num;
 					} else {