diff --git a/ChangeLog b/ChangeLog
index 6d0490add58..0dbe3ebab3f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -34,8 +34,9 @@ Fix: The customer code was set to uppercase when using numbering module leopard.
      must keep data safe of any change.
 Fix: Loading actions extrafields fails.
 Fix: [ bug #1123 ] Paid deposit invoices are always shown as partially paid when fully paid
-Fix: Corrected project contact types translation
-Fix: [ bug #1206 ] PMP price is bad calculated
+Fix: Corrected project contact types translation.
+Fix: [ bug #1206 ] PMP price is bad calculated.
+Fix: [ bug #520 ] Product statistics and detailed lists are wrong.
 
 ***** ChangeLog for 3.5 compared to 3.4.* *****
 For users:
diff --git a/htdocs/product/index.php b/htdocs/product/index.php
index 7dc9d4917a6..daa2ae08854 100644
--- a/htdocs/product/index.php
+++ b/htdocs/product/index.php
@@ -114,8 +114,8 @@ $result = $db->query($sql);
 while ($objp = $db->fetch_object($result))
 {
 	$status=1;
-	if (! $objp->tosell && ! $objp->tobuy) $status=0;
-	$prodser[$objp->fk_product_type][$status]=$objp->total;
+	if (! $objp->tosell && ! $objp->tobuy) $status=0;	// To sell OR to buy
+	$prodser[$objp->fk_product_type][$status]+=$objp->total;
 }
 
 print '<table class="noborder" width="100%">';