diff --git a/comfy/quant_ops.py b/comfy/quant_ops.py
index 96fd211d5..b6bce4db1 100644
--- a/comfy/quant_ops.py
+++ b/comfy/quant_ops.py
@@ -128,6 +128,12 @@ except ImportError as e:
                     dtype = kwargs.get("dtype", input_t.dtype)
                     device = kwargs.get("device", input_t.device)
                     return torch.empty(input_t.shape, dtype=dtype, device=device)
+            
+            if func is torch.Tensor.copy_:
+                dst, src = args[:2]
+                if isinstance(src, cls):
+                    return dst.copy_(src.dequantize(), **kwargs)
+
             return NotImplemented
 
         def __torch_dispatch__(self, func, types, args=(), kwargs=None):