diff --git a/comfy/sd.py b/comfy/sd.py
index 7425765a4..5b6b59ea4 100644
--- a/comfy/sd.py
+++ b/comfy/sd.py
@@ -1745,6 +1745,8 @@ def load_diffusion_model_state_dict(sd, model_options={}, metadata=None, disable
     temp_sd = comfy.utils.state_dict_prefix_replace(sd, {diffusion_model_prefix: ""}, filter_keys=True)
     if len(temp_sd) > 0:
         sd = temp_sd
+        if custom_operations is None:
+            sd, metadata = comfy.utils.convert_old_quants(sd, "", metadata=metadata)
 
     parameters = comfy.utils.calculate_parameters(sd)
     weight_dtype = comfy.utils.weight_dtype(sd)