diff --git a/src/croc/croc.go b/src/croc/croc.go
index a9e6e9a2..570ac63a 100644
--- a/src/croc/croc.go
+++ b/src/croc/croc.go
@@ -118,6 +118,9 @@ type RemoteFileRequest struct {
 	FilesToTransferCurrentNum int
 }
 
+type SenderInfo struct {
+}
+
 func (m Message) String() string {
 	b, _ := json.Marshal(m)
 	return string(b)