diff --git a/quantipy/core/dataset.py b/quantipy/core/dataset.py
index f382a9d4d..c95f0b690 100644
--- a/quantipy/core/dataset.py
+++ b/quantipy/core/dataset.py
@@ -6943,6 +6943,7 @@ def filter(self, alias, condition, inplace=False):
         Filter the DataSet using a Quantipy logical expression.
         """
         data = self._data.copy()
+        data.index = pd.Index(range(0, len(data.index)))
         filter_idx, _ = get_logic_index(pd.Series(data.index), condition, data)
         filtered_data = data.iloc[filter_idx, :]
         if inplace: