diff --git a/MinkowskiEngine/utils/quantization.py b/MinkowskiEngine/utils/quantization.py
index a50c3caa..9a19e8d2 100644
--- a/MinkowskiEngine/utils/quantization.py
+++ b/MinkowskiEngine/utils/quantization.py
@@ -130,6 +130,8 @@ def _auto_floor(array):
     if isinstance(array, np.ndarray):
         return np.floor(array)
     else:
+        if array.dtype == torch.int32 or array.dtype == torch.int64:
+            return array
         return torch.floor(array)