diff --git a/go/vt/vtgate/engine/cached_size.go b/go/vt/vtgate/engine/cached_size.go
index 14962bc86d7..65cd119a377 100644
--- a/go/vt/vtgate/engine/cached_size.go
+++ b/go/vt/vtgate/engine/cached_size.go
@@ -955,7 +955,7 @@ func (cached *Send) CachedSize(alloc bool) int64 {
 	}
 	size := int64(0)
 	if alloc {
-		size += int64(48)
+		size += int64(64)
 	}
 	// field Keyspace *vitess.io/vitess/go/vt/vtgate/vindexes.Keyspace
 	size += cached.Keyspace.CachedSize(true)