diff --git a/invokeai/backend/model_manager/configs/lora.py b/invokeai/backend/model_manager/configs/lora.py
index 1619c9d6f06..791ded2ed0a 100644
--- a/invokeai/backend/model_manager/configs/lora.py
+++ b/invokeai/backend/model_manager/configs/lora.py
@@ -711,6 +711,8 @@ def _validate_looks_like_lora(cls, mod: ModelOnDisk) -> None:
             state_dict,
             {
                 "diffusion_model.layers.",  # Z-Image S3-DiT layer pattern
+                "transformer.layers.",  # OneTrainer/diffusers prefix variant
+                "base_model.model.transformer.layers.",  # PEFT-wrapped variant
             },
         )
 
@@ -747,6 +749,8 @@ def _get_base_or_raise(cls, mod: ModelOnDisk) -> BaseModelType:
             state_dict,
             {
                 "diffusion_model.layers.",  # Z-Image S3-DiT layer pattern
+                "transformer.layers.",  # OneTrainer/diffusers prefix variant
+                "base_model.model.transformer.layers.",  # PEFT-wrapped variant
             },
         )