diff --git a/qwen3_6_scripts/paged_attn.py b/qwen3_6_scripts/paged_attn.py
index e7daa2fe..e8a8f2c5 100644
--- a/qwen3_6_scripts/paged_attn.py
+++ b/qwen3_6_scripts/paged_attn.py
@@ -2256,4 +2256,5 @@ class PagedAttention:
     ) -> None:
         key_caches = [kv_cache[0] for kv_cache in kv_caches]
         value_caches = [kv_cache[1] for kv_cache in kv_caches]
-        ops.copy_blocks(key_caches, value_caches, src_to_dists)
+        import ixformer.functions as ixf_F
+        ixf_F.vllm_copy_cache(key_caches, value_caches, src_to_dists)