diff --git a/option.go b/option.go
index b5729c6..33c8a98 100644
--- a/option.go
+++ b/option.go
@@ -1,11 +1,9 @@
 package lite
 
-import (
-	"fmt"
-)
+import "errors"
 
 var (
-	ErrBadFilename error = fmt.Errorf("database filename cannot be empty")
+	ErrBadFilename error = errors.New("database filename cannot be empty")
 )
 
 type Option func(d *database) error