diff --git a/src/fancypackage/io/_zarr.py b/src/fancypackage/io/_zarr.py
index abe6799..e71f1f4 100644
--- a/src/fancypackage/io/_zarr.py
+++ b/src/fancypackage/io/_zarr.py
@@ -19,7 +19,7 @@ def write_zarr(data: AnnData | MuData | TreeData, path: Path) -> None:
 
     Parameters
     ----------
-    adata
+    data
         AnnData-like object to save; supports AnnData, MuData and TreeData.
     path
         Filename of Zarr store.