diff --git a/flopy/mf6/data/mffileaccess.py b/flopy/mf6/data/mffileaccess.py
index ecebc82571..11e1bc422f 100644
--- a/flopy/mf6/data/mffileaccess.py
+++ b/flopy/mf6/data/mffileaccess.py
@@ -1002,7 +1002,8 @@ def read_list_data_from_file(self, file_handle, storage, current_key,
                                          len(self._last_line_info):]:
                             if arr_line_len <= data_index:
                                 break
-                            if arr_line[data_index][0] == '#':
+                            if len(arr_line[data_index]) > 0 and \
+                                    arr_line[data_index][0] == '#':
                                 break
                             elif data_item.name == 'aux':
                                 data_index, self._data_line = \