diff --git a/src/llamafactory/model/model_utils/moe.py b/src/llamafactory/model/model_utils/moe.py
index d89019865..592e7e397 100644
--- a/src/llamafactory/model/model_utils/moe.py
+++ b/src/llamafactory/model/model_utils/moe.py
@@ -147,6 +147,11 @@ def add_z3_leaf_module(model: "PreTrainedModel") -> None:
 
         _set_z3_leaf_modules(model, [Qwen3NextSparseMoeBlock])
 
+    if model_type == "qwen3_5_moe":
+        from transformers.models.qwen3_5_moe.modeling_qwen3_5_moe import Qwen3_5MoeSparseMoeBlock
+
+        _set_z3_leaf_modules(model, [Qwen3_5MoeSparseMoeBlock])
+
 
 def configure_moe(config: "PretrainedConfig", model_args: "ModelArguments", is_trainable: bool) -> None:
     if not is_trainable or not model_args.moe_aux_loss_coef: