diff --git a/python/sglang/srt/models/deepseek_nextn.py b/python/sglang/srt/models/deepseek_nextn.py
index cb13a7c676a9..d62111471436 100644
--- a/python/sglang/srt/models/deepseek_nextn.py
+++ b/python/sglang/srt/models/deepseek_nextn.py
@@ -29,6 +29,7 @@
     can_cp_split,
     cp_all_gather_rerange_output,
     cp_split_and_rebuild_data,
+    cp_split_and_rebuild_position,
     is_nsa_enable_prefill_cp,
     nsa_use_prefill_cp,
     prepare_input_dp_with_cp_dsa,
@@ -160,6 +161,7 @@ def forward(
 
         if nsa_use_prefill_cp(forward_batch, self.nsa_enable_prefill_cp):
             hidden_states = cp_split_and_rebuild_data(forward_batch, hidden_states)
+            positions = cp_split_and_rebuild_position(forward_batch, positions)
         residual = None
         with get_global_expert_distribution_recorder().disable_this_region():
             hidden_states, residual = self.decoder(