diff --git a/modin/core/dataframe/pandas/dataframe/dataframe.py b/modin/core/dataframe/pandas/dataframe/dataframe.py
index d5d062f5e51..df0e5c46e3a 100644
--- a/modin/core/dataframe/pandas/dataframe/dataframe.py
+++ b/modin/core/dataframe/pandas/dataframe/dataframe.py
@@ -3450,7 +3450,7 @@ def broadcast_apply_full_axis(
                 kw["column_widths"] = [len(new_columns)]
         elif axis == 1:
             if is_index_materialized and new_partitions.shape[0] == 1:
-                kw["row_lengths"] = [len(new_columns)]
+                kw["row_lengths"] = [len(new_index)]
         if not keep_partitioning:
             if kw["row_lengths"] is None and is_index_materialized:
                 if axis == 0: