diff --git a/scripts/conversion/convert_diffusers_unet.py b/scripts/conversion/convert_diffusers_unet.py
index d46f7e1..014db37 100644
--- a/scripts/conversion/convert_diffusers_unet.py
+++ b/scripts/conversion/convert_diffusers_unet.py
@@ -27,6 +27,9 @@ def setup_converter(args: Args) -> ModelConverter:
         subfolder=args.subfolder,
         low_cpu_mem_usage=False,
     )
+    if args.override_weights is not None:
+        sd = torch.load(args.override_weights)  # type: ignore
+        source.load_state_dict(sd)
     source_in_channels: int = source.config.in_channels  # type: ignore
     source_clip_embedding_dim: int = source.config.cross_attention_dim  # type: ignore
     source_has_time_ids: bool = source.config.addition_embed_type == "text_time"  # type: ignore
@@ -95,6 +98,15 @@ def main() -> None:
             " runwayml/stable-diffusion-v1-5"
         ),
     )
+    parser.add_argument(
+        "--override-weights",
+        type=str,
+        default=None,
+        help=(
+            "Path to a weights file to override the source model (keeping its config). "
+            "This is useful for models distributed as .pth files."
+        ),
+    )
     parser.add_argument(
         "--to",
         type=str,