diff --git a/weed/s3api/s3api_server.go b/weed/s3api/s3api_server.go
index 53d99055c..5cf71114b 100644
--- a/weed/s3api/s3api_server.go
+++ b/weed/s3api/s3api_server.go
@@ -25,7 +25,7 @@ import (
 )
 
 const (
-	BucketPathTpl = "/{object:[a-z0-9][a-z0-9-]+[a-z0-9]}"
+	BucketPathTpl = "/{object:[a-z0-9].+[a-z0-9]}"
 )
 
 type S3ApiServerOption struct {