diff --git a/protocol/files/filesharing_subsystem.go b/protocol/files/filesharing_subsystem.go
index 7fa33d3..b2f6241 100644
--- a/protocol/files/filesharing_subsystem.go
+++ b/protocol/files/filesharing_subsystem.go
@@ -79,6 +79,7 @@ func (fsss *FileSharingSubSystem) RequestManifestParts(fileKey string) []model.P
 		manifest := manifestI.(*Manifest)
 		serializedManifest := manifest.Serialize()
 		log.Debugf("found serialized manifest: %s", serializedManifest)
+		chunkID := 0;
 		for i := 0; i < len(serializedManifest); i += DefaultChunkSize {
 			offset := i
 			end := (i + 1) + DefaultChunkSize
@@ -90,9 +91,10 @@ func (fsss *FileSharingSubSystem) RequestManifestParts(fileKey string) []model.P
 			// request this manifest part
 			messages = append(messages, model.PeerMessage{
 				Context: event.ContextSendManifest,
-				ID:      fmt.Sprintf("%s.%d", fileKey, uint64(i)),
+				ID:      fmt.Sprintf("%s.%d", fileKey, chunkID),
 				Data:    chunk,
 			})
+			chunkID+=1
 		}
 	}
 	return messages