diff --git a/tinygrad/shape/view.py b/tinygrad/shape/view.py
index 906cb91afc..518c9e233a 100644
--- a/tinygrad/shape/view.py
+++ b/tinygrad/shape/view.py
@@ -245,8 +245,7 @@ class View:
 
   @functools.lru_cache(maxsize=None)  # pylint: disable=method-cache-max-size-none
   def permute(self, axis: Tuple[int, ...]) -> View:
-    assert all(isinstance(x, int) and x >= 0 and x < len(self.shape) for x in axis), f"invalid permute {axis} for {self.shape}"
-    assert len(set(axis)) == len(axis) and len(axis) == len(self.shape), f"can't permute {self.shape} with {axis}"
+    assert sorted(axis) == list(range(len(self.shape))), f"invalid permutation {axis} of len {len(self.shape)}"
     return View.create(tuple(self.shape[a] for a in axis), tuple(self.strides[a] for a in axis), self.offset,
                        tuple(self.mask[a] for a in axis) if self.mask is not None else None)