diff --git a/python/sglang/srt/model_executor/cuda_graph_runner.py b/python/sglang/srt/model_executor/cuda_graph_runner.py
index 22ed6cc2b..d9a9861cc 100644
--- a/python/sglang/srt/model_executor/cuda_graph_runner.py
+++ b/python/sglang/srt/model_executor/cuda_graph_runner.py
@@ -307,7 +307,7 @@ class CudaGraphRunner:
             bs,
             self.req_pool_indices,
             self.seq_lens,
-            forward_batch.seq_lens_sum,
+            forward_batch.seq_lens_sum + (bs - raw_bs),
             self.encoder_lens,
         )