diff --git a/br/pkg/storage/local.go b/br/pkg/storage/local.go
index 0259e715c7968..21c6c42f2b6fe 100644
--- a/br/pkg/storage/local.go
+++ b/br/pkg/storage/local.go
@@ -121,7 +121,7 @@ func (l *LocalStorage) WalkDir(_ context.Context, opt *WalkOption, fn func(strin
 
 // URI returns the base path as an URI with a file:/// prefix.
 func (l *LocalStorage) URI() string {
-	return LocalURIPrefix + "/" + l.base
+	return LocalURIPrefix + l.base
 }
 
 // Open a Reader by file path, path is a relative path to base path.