diff --git a/gptqmodel/models/definitions/qwen3_5.py b/gptqmodel/models/definitions/qwen3_5.py
index 564c5a08d..d1552f981 100644
--- a/gptqmodel/models/definitions/qwen3_5.py
+++ b/gptqmodel/models/definitions/qwen3_5.py
@@ -24,6 +24,11 @@ class Qwen3_5QModel(LlamaQModel):
 
     rotary_embedding = "model.language_model.rotary_emb"
 
+    # Preserve auxiliary MTP/draft-head tensors when present.
+    # Qwen3_5_MoeQModel already does this; dense Qwen3.5/Qwen3.6 models
+    # can also ship mtp.* tensors in auxiliary safetensors files.
+    out_of_model_tensors = {"prefixes": ["mtp"]}
+
     module_tree = [
         "model",
         "language_model",
diff --git a/gptqmodel/models/definitions/qwen3_5_text.py b/gptqmodel/models/definitions/qwen3_5_text.py
index 558a715d3..b3d91925e 100644
--- a/gptqmodel/models/definitions/qwen3_5_text.py
+++ b/gptqmodel/models/definitions/qwen3_5_text.py
@@ -16,6 +16,11 @@ class Qwen3_5TextQModel(Qwen3QModel):
 
     rotary_embedding = "model.rotary_emb"
 
+    # Preserve auxiliary MTP/draft-head tensors when present.
+    # Dense text-only Qwen3.5/Qwen3.6 models can ship mtp.* tensors in
+    # auxiliary safetensors files.
+    out_of_model_tensors = {"prefixes": ["mtp"]}
+
     module_tree = [
         "model",
         "layers",
diff --git a/tests/unit/models/definitions/test_qwen3_5_mtp.py b/tests/unit/models/definitions/test_qwen3_5_mtp.py
new file mode 100644
index 000000000..5d62a6271
--- /dev/null
+++ b/tests/unit/models/definitions/test_qwen3_5_mtp.py
@@ -0,0 +1,10 @@
+from gptqmodel.models.definitions.qwen3_5 import Qwen3_5QModel
+from gptqmodel.models.definitions.qwen3_5_text import Qwen3_5TextQModel
+
+
+def test_qwen3_5_preserves_mtp_out_of_model_tensors():
+    assert Qwen3_5QModel.out_of_model_tensors == {"prefixes": ["mtp"]}
+
+
+def test_qwen3_5_text_preserves_mtp_out_of_model_tensors():
+    assert Qwen3_5TextQModel.out_of_model_tensors == {"prefixes": ["mtp"]}