diff --git a/migration.go b/migration.go
index b4fdba9..f0572dc 100644
--- a/migration.go
+++ b/migration.go
@@ -30,7 +30,7 @@ type Migration struct {
 }
 
 func (m *Migration) String() string {
-	return fmt.Sprintf(m.Source)
+	return fmt.Sprint(m.Source)
 }
 
 // Up runs an up migration.