diff --git a/miles/backends/megatron_utils/actor.py b/miles/backends/megatron_utils/actor.py
index 04c838e49c9..97b4d3b6027 100644
--- a/miles/backends/megatron_utils/actor.py
+++ b/miles/backends/megatron_utils/actor.py
@@ -59,7 +59,6 @@
 from .replay_utils import register_replay_list_moe
 from .update_weight.common import named_params_and_buffers
 from .update_weight.update_weight_from_distributed.broadcast import UpdateWeightFromDistributed
-from .update_weight.update_weight_from_distributed.p2p import UpdateWeightP2P
 from .update_weight.update_weight_from_tensor import UpdateWeightFromTensor
 
 if TYPE_CHECKING:
@@ -261,6 +260,10 @@ def init(
 
                 update_weight_cls = UpdateWeightFromDiskDelta
             else:
+                # Mooncake loads its RDMA shared libraries at import time.
+                # Other transfer modes must not require a compatible RDMA setup.
+                from .update_weight.update_weight_from_distributed.p2p import UpdateWeightP2P
+
                 update_weight_cls = UpdateWeightP2P
         self.weight_updater = update_weight_cls(
             self.args,