diff --git a/storage.proto b/storage.proto
index 73c71c5..a56a1ff 100644
--- a/storage.proto
+++ b/storage.proto
@@ -43,7 +43,7 @@ message StatResponse {
 message ListRequest {
     string path = 1;
     bool include_md5 = 2;
-    uint32 filter_size = 3;
+    uint32 filter_max_size = 3;
 }
 
 message ListResponse {