diff --git a/python/sglang/srt/disaggregation/prefill.py b/python/sglang/srt/disaggregation/prefill.py
index d9016d0f9..7ab978a79 100644
--- a/python/sglang/srt/disaggregation/prefill.py
+++ b/python/sglang/srt/disaggregation/prefill.py
@@ -490,6 +490,9 @@ class SchedulerDisaggregationPrefillMixin:
 
         if copy_done is not None:
             copy_done.synchronize()
+        if result.routed_experts_output is not None:
+            result.routed_experts_output.finalize()
+            result.routed_experts_output = None
 
         logprob_pt = 0
         # Transfer kv for prefill completed requests and add it into disagg_prefill_inflight_queue