diff --git a/src/llamafactory/model/loader.py b/src/llamafactory/model/loader.py
index 52815bb2..4d6b5a99 100644
--- a/src/llamafactory/model/loader.py
+++ b/src/llamafactory/model/loader.py
@@ -85,6 +85,9 @@ def load_tokenizer(model_args: "ModelArguments") -> "TokenizerModule":
         )
     except Exception as e:
         raise OSError("Failed to load tokenizer.") from e
+        
+    if model_args.model_max_length is not None and tokenizer.model_max_length != model_args.model_max_length:
+        tokenizer.model_max_length = model_args.model_max_length
 
     if model_args.new_special_tokens is not None:
         num_added_tokens = tokenizer.add_special_tokens(