diff --git a/internal/proxy/channels_mgr.go b/internal/proxy/channels_mgr.go
index 7da4868ee1..2b15bf68f3 100644
--- a/internal/proxy/channels_mgr.go
+++ b/internal/proxy/channels_mgr.go
@@ -49,7 +49,9 @@ type channelsMgr interface {
 	removeAllDMLStream() error
 }
 
+// getChannelsFuncType returns the channel information according to the collection id.
 type getChannelsFuncType = func(collectionID UniqueID) (map[vChan]pChan, error)
+
 type repackFuncType = func(tsMsgs []msgstream.TsMsg, hashKeys [][]int32) (map[int32]*msgstream.MsgPack, error)
 
 // getDmlChannelsFunc returns a function about how to get dml channels of a collection.