diff --git a/vllm/core/scheduler.py b/vllm/core/scheduler.py
index f507847ad..1ba1d175a 100644
--- a/vllm/core/scheduler.py
+++ b/vllm/core/scheduler.py
@@ -770,7 +770,6 @@ class Scheduler:
             swapped_queue.popleft()
             self._swap_in(seq_group, blocks_to_swap_in)
             self._append_slots(seq_group, blocks_to_copy, enable_chunking)
-            is_prefill = seq_group.is_prefill()
             if is_prefill:
                 prefill_seq_groups.append(
                     ScheduledSequenceGroup(