diff --git a/addons/product/product.py b/addons/product/product.py
index b5d4750c174..e8dc6909807 100644
--- a/addons/product/product.py
+++ b/addons/product/product.py
@@ -776,7 +776,7 @@ class product_template(osv.osv):
             ctx.update(active_test=False)
             product_ids = []
             for product in self.browse(cr, uid, ids, context=ctx):
-                product_ids = map(int,product.product_variant_ids)
+                product_ids += map(int, product.product_variant_ids)
             self.pool.get("product.product").write(cr, uid, product_ids, {'active': vals.get('active')}, context=ctx)
         return res