diff --git a/python/sglang/srt/layers/attention/nsa_backend.py b/python/sglang/srt/layers/attention/nsa_backend.py
index 18b1b9daf..4202501b1 100644
--- a/python/sglang/srt/layers/attention/nsa_backend.py
+++ b/python/sglang/srt/layers/attention/nsa_backend.py
@@ -435,7 +435,7 @@ class NativeSparseAttnBackend(
                 # after verification. Lengths vary per request based on how many tokens
                 # were accepted.
                 page_table = torch.repeat_interleave(
-                    page_table, repeats=extend_seq_lens_cpu, dim=0
+                    page_table, repeats=forward_batch.extend_seq_lens, dim=0
                 )
 
         elif forward_batch.forward_mode.is_extend():