From 671b3c8d8e8a1b0d6cb5f892a3755b729e21e76f Mon Sep 17 00:00:00 2001
From: Jiaming Yuan <jm.yuan@outlook.com>
Date: Sun, 20 Feb 2022 03:42:47 +0800
Subject: [PATCH] Fix typo. (#7680)

---
 src/tree/tree_model.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/tree/tree_model.cc b/src/tree/tree_model.cc
index f42624bbe..ec4beaddd 100644
--- a/src/tree/tree_model.cc
+++ b/src/tree/tree_model.cc
@@ -868,7 +868,8 @@ void RegTree::Save(dmlc::Stream* fo) const {
   CHECK_EQ(param.num_nodes, static_cast<int>(stats_.size()));
   CHECK_EQ(param.deprecated_num_roots, 1);
   CHECK_NE(param.num_nodes, 0);
-  CHECK(!HasCategoricalSplit()) << "Please JSON/UBJSON for saving models with categorical splits.";
+  CHECK(!HasCategoricalSplit())
+      << "Please use JSON/UBJSON for saving models with categorical splits.";
 
   if (DMLC_IO_NO_ENDIAN_SWAP) {
     fo->Write(&param, sizeof(TreeParam));