diff --git a/lilac/data/dataset_duckdb.py b/lilac/data/dataset_duckdb.py
index 5040acd2..56cefd09 100644
--- a/lilac/data/dataset_duckdb.py
+++ b/lilac/data/dataset_duckdb.py
@@ -1839,7 +1839,7 @@ def stats(self, leaf_path: Path, include_deleted: bool = False) -> StatsResult:
         sample_where_clause = ''
       else:
         sample_where_clause = (
-          f'WHERE val != 0 {'AND NOT isnan(val)' if is_float(leaf.dtype) else ''}'
+          f"WHERE val != 0 {'AND NOT isnan(val)' if is_float(leaf.dtype) else ''}"
         )
       sample_query = f"""
         SELECT COALESCE(ARRAY_AGG(val), [])