diff --git a/internal/datacoord/server.go b/internal/datacoord/server.go
index 3fb64f889d..04a7840744 100644
--- a/internal/datacoord/server.go
+++ b/internal/datacoord/server.go
@@ -454,7 +454,7 @@ func (s *Server) startDataNodeTtLoop(ctx context.Context) {
 			}
 			msgPack := ttMsgStream.Consume()
 			if msgPack == nil {
-				log.Debug("receive nil tt msg, shutdown tt channel")
+				log.Debug("receive nil timetick msg and shutdown timetick channel")
 				return
 			}
 			for _, msg := range msgPack.Msgs {