diff --git a/internal/querycoord/cluster.go b/internal/querycoord/cluster.go
index 16c193c270..8df3fe61c6 100644
--- a/internal/querycoord/cluster.go
+++ b/internal/querycoord/cluster.go
@@ -292,7 +292,7 @@ func (c *queryNodeCluster) watchDmChannels(ctx context.Context, nodeID int64, in
 
 		return nil
 	}
-	return fmt.Errorf("watchDmChannels: can't find query node by nodeID, nodeID = %d", nodeID)
+	return fmt.Errorf("watchDmChannels: can't find QueryNode by nodeID, nodeID = %d", nodeID)
 }
 
 func (c *queryNodeCluster) watchDeltaChannels(ctx context.Context, nodeID int64, in *querypb.WatchDeltaChannelsRequest) error {