diff --git a/python/sglang/srt/managers/tokenizer_manager.py b/python/sglang/srt/managers/tokenizer_manager.py
index acb3c9fcd..e2830217c 100644
--- a/python/sglang/srt/managers/tokenizer_manager.py
+++ b/python/sglang/srt/managers/tokenizer_manager.py
@@ -842,7 +842,7 @@ class TokenizerManager(TokenizerControlMixin, TokenizerManagerScoreMixin):
         if (
             self.validate_total_tokens
             and max_new_tokens is not None
-            and (max_new_tokens + input_token_num) >= _max_req_len
+            and (max_new_tokens + input_token_num) > _max_req_len
         ):
             if self.server_args.allow_auto_truncate:
                 logger.warning(