diff --git a/interpol/nd.py b/interpol/nd.py
index c26333f..0cfdef3 100644
--- a/interpol/nd.py
+++ b/interpol/nd.py
@@ -441,4 +441,4 @@ def hess(inp, grid, bound: List[Bound], spline: List[Spline],
             out.unbind(-1)[d2].unbind(-1)[d].copy_(out.unbind(-1)[d].unbind(-1)[d2])
 
     out = out.reshape(list(out.shape[:2]) + oshape + list(out.shape[-2:]))
-    return out
\ No newline at end of file
+    return out