diff --git a/python/sglang/srt/managers/tokenizer_manager.py b/python/sglang/srt/managers/tokenizer_manager.py
index c9fedff28..45cf37b48 100644
--- a/python/sglang/srt/managers/tokenizer_manager.py
+++ b/python/sglang/srt/managers/tokenizer_manager.py
@@ -1659,7 +1659,10 @@ class TokenizerManager(TokenizerCommunicatorMixin, TokenizerManagerMultiItemMixi
         if recv_obj.input_token_logprobs_val is None:
             return
 
-        if len(recv_obj.input_token_logprobs_val) > 0:
+        if (
+            len(recv_obj.input_token_logprobs_val) > 0
+            and recv_obj.input_token_logprobs_val[recv_obj_index] is not None
+        ):
             state.input_token_logprobs_val.extend(
                 recv_obj.input_token_logprobs_val[recv_obj_index]
             )