diff --git a/comfy/quant_ops.py b/comfy/quant_ops.py
index 9a2f399d8..e938144a7 100644
--- a/comfy/quant_ops.py
+++ b/comfy/quant_ops.py
@@ -228,14 +228,14 @@ class QuantizedTensor(torch.Tensor):
         new_kwargs = dequant_arg(kwargs)
         return func(*new_args, **new_kwargs)
 
-    def data_ptr(cls):
-        return cls._qdata.data_ptr()
+    def data_ptr(self):
+        return self._qdata.data_ptr()
 
-    def is_pinned(cls):
-        return cls._qdata.is_pinned()
+    def is_pinned(self):
+        return self._qdata.is_pinned()
 
-    def is_contiguous(cls):
-        return cls._qdata.is_contiguous()
+    def is_contiguous(self):
+        return self._qdata.is_contiguous()
 
 # ==============================================================================
 # Generic Utilities (Layout-Agnostic Operations)