diff --git a/pandas/core/indexing.py b/pandas/core/indexing.py
index a49c0741b64fe..11fb17062bdba 100644
--- a/pandas/core/indexing.py
+++ b/pandas/core/indexing.py
@@ -21,6 +21,7 @@
     is_object_dtype,
     is_scalar,
     is_sequence,
+    is_categorical_dtype
 )
 from pandas.core.dtypes.concat import concat_compat
 from pandas.core.dtypes.generic import ABCDataFrame, ABCMultiIndex, ABCSeries
@@ -1785,6 +1786,8 @@ def _setitem_single_column(self, loc: int, value, plane_indexer):
         else:
             # set the item, possibly having a dtype change
             ser = ser.copy()
+            # if is_list_like(value) and len(value) == 1 and not is_categorical_dtype(value):
+            #         value = value[0]
             ser._mgr = ser._mgr.setitem(indexer=pi, value=value)
             ser._maybe_update_cacher(clear=True)