--- baked-ours/v1/worker/cp_utils.py	2026-09-10 19:56:14.000000000 +0200
+++ baked/v1/worker/cp_utils.py	2026-09-11 10:13:47.000000000 +0200
@@ -35,6 +35,10 @@
                     f"but {backend.get_name()} does not support PCP."
                 )
             layer_impl = getattr(layer, "impl", None)
+            if layer_impl is None and hasattr(layer, "need_to_return_lse_for_decode"):
+                # DeepSeek-V4.1 attention runs its own forward (no
+                # AttentionImpl) and exposes the DCP contract on the layer.
+                layer_impl = layer
             if layer_impl is None:
                 continue
             if vllm_config.speculative_config is not None and interleave_size > 1: