diff --git a/python/cudf/cudf/core/dataframe.py b/python/cudf/cudf/core/dataframe.py
index 84c16b71997..56558e0ec60 100644
--- a/python/cudf/cudf/core/dataframe.py
+++ b/python/cudf/cudf/core/dataframe.py
@@ -7885,9 +7885,7 @@ def _get_union_of_indices(indexes):
         return indexes[0]
     else:
         merged_index = cudf.core.index.GenericIndex._concat(indexes)
-        merged_index = merged_index.drop_duplicates()
-        inds = merged_index._values.argsort()
-        return merged_index.take(inds)
+        return merged_index.drop_duplicates()
 
 
 def _get_union_of_series_names(series_list):
diff --git a/python/cudf/cudf/tests/test_dataframe.py b/python/cudf/cudf/tests/test_dataframe.py
index cbef9bfa2d8..e3dadcb4db1 100644
--- a/python/cudf/cudf/tests/test_dataframe.py
+++ b/python/cudf/cudf/tests/test_dataframe.py
@@ -220,6 +220,18 @@ def test_init_unaligned_with_index():
     assert_eq(pdf, gdf, check_dtype=False)
 
 
+def test_init_series_list_columns_unsort():
+    pseries = [
+        pd.Series(i, index=["b", "a", "c"], name=str(i)) for i in range(3)
+    ]
+    gseries = [
+        cudf.Series(i, index=["b", "a", "c"], name=str(i)) for i in range(3)
+    ]
+    pdf = pd.DataFrame(pseries)
+    gdf = cudf.DataFrame(gseries)
+    assert_eq(pdf, gdf)
+
+
 def test_series_basic():
     # Make series from buffer
     a1 = np.arange(10, dtype=np.float64)