diff --git a/scdataloader/utils.py b/scdataloader/utils.py
index b2df360..84a003c 100644
--- a/scdataloader/utils.py
+++ b/scdataloader/utils.py
@@ -142,7 +142,7 @@ def getBiomartTable(
     res = res[~(res["ensembl_gene_id"].isna())]
     if "hgnc_symbol" in res.columns:
         res.loc[res[res.hgnc_symbol.isna()].index, "hgnc_symbol"] = res[
-            ~res.hgnc_symbol.isna()
+            res.hgnc_symbol.isna()
         ]["ensembl_gene_id"]
     return res