diff --git a/controllers/product.go b/controllers/product.go
index add6dcfd..ea780786 100644
--- a/controllers/product.go
+++ b/controllers/product.go
@@ -182,7 +182,7 @@ func (c *ApiController) BuyProduct() {
 	paidUserName := c.Input().Get("userName")
 	owner, _ := util.GetOwnerAndNameFromId(id)
 	userId := util.GetId(owner, paidUserName)
-	if paidUserName != "" && !c.IsAdmin() {
+	if paidUserName != "" && paidUserName != c.GetSessionUsername() && !c.IsAdmin() {
 		c.ResponseError(c.T("general:Only admin user can specify user"))
 		return
 	}