diff --git a/py-polars/polars/series/series.py b/py-polars/polars/series/series.py
index 84819242e9e1..bbd2c28688a4 100644
--- a/py-polars/polars/series/series.py
+++ b/py-polars/polars/series/series.py
@@ -1088,6 +1088,7 @@ def __truediv__(self, other: Any) -> Series | Expr:
             self._recursive_cast_to_dtype(Float64())
             if not (
                 self.dtype.is_float()
+                or self.dtype.is_decimal()
                 or isinstance(self.dtype, List)
                 or (isinstance(other, Series) and isinstance(other.dtype, List))
             )