diff --git a/migration_test.go b/migration_test.go
index 3f3a5c8f..6c10f62e 100644
--- a/migration_test.go
+++ b/migration_test.go
@@ -139,6 +139,11 @@ func (role Role) IsAdmin() bool {
 
 type Num int64
 
+func (i *Num) Value() (driver.Value, error) {
+	// guaranteed ok
+	return int64(*i), nil
+}
+
 func (i *Num) Scan(src interface{}) error {
 	switch s := src.(type) {
 	case []byte: