diff --git a/xarray/core/dataset.py b/xarray/core/dataset.py
index f8cf23d188c..1651476c338 100644
--- a/xarray/core/dataset.py
+++ b/xarray/core/dataset.py
@@ -7371,7 +7371,7 @@ def to_dataframe(self, dim_order: Sequence[Hashable] | None = None) -> pd.DataFr
             dataframe.
 
             If provided, must include all dimensions of this dataset. By
-            default, dimensions are sorted alphabetically.
+            default, dimensions are in the same order as in `Dataset.sizes`.
 
         Returns
         -------