diff --git a/src/drf_chunked_upload/views.py b/src/drf_chunked_upload/views.py
index 5b9c177..d3bc90f 100644
--- a/src/drf_chunked_upload/views.py
+++ b/src/drf_chunked_upload/views.py
@@ -187,9 +187,12 @@ def _put_chunk(self, request, pk=None, whole=False, *args, **kwargs):
                                                pk=upload_id)
             self.is_valid_chunked_upload(chunked_upload)
             if chunked_upload.offset != start:
-                raise ChunkedUploadError(status=status.HTTP_400_BAD_REQUEST,
-                                         detail='Offsets do not match',
-                                         offset=chunked_upload.offset)
+                raise ChunkedUploadError(
+                     status=status.HTTP_400_BAD_REQUEST,
+                     detail='Offsets do not match',
+                     expected_offset=chunked_upload.offset,
+                     provided_offset=start,
+                )
 
             chunked_upload.append_chunk(chunk, chunk_size=chunk_size)
         else:
diff --git a/tests/test_uploads.py b/tests/test_uploads.py
index 420bf64..a7b088f 100644
--- a/tests/test_uploads.py
+++ b/tests/test_uploads.py
@@ -189,7 +189,8 @@ def test_chunked_upload_wrong_order(view, user1):
     print(response.data)
     assert response.status_code == status.HTTP_400_BAD_REQUEST
     assert response.data['detail'] == 'Offsets do not match'
-    assert response.data['offset'] == 10
+    assert response.data['expected_offset'] == 10
+    assert response.data['provided_offset'] == 20
 
 
 @pytest.mark.django_db