diff --git a/mlair/data_handler/data_handler_wrf_chem.py b/mlair/data_handler/data_handler_wrf_chem.py
index 73fca3e4ff5ed0089927586f58d35b2fb8fc0ea9..dbbbcd992b40f93268094ed223dbdda1a279c714 100644
--- a/mlair/data_handler/data_handler_wrf_chem.py
+++ b/mlair/data_handler/data_handler_wrf_chem.py
@@ -624,8 +624,8 @@ class DataHandlerSectorGrid(DataHandlerSingleGridColumn):
         if radius is None:
             radius = 100  # km
         self.radius = radius
-        if sectors is None:
-            sectors = WindSector.DEFAULT_WIND_SECTORS
+        if wind_sectors is None:
+            wind_sectors = WindSector.DEFAULT_WIND_SECTORS
         self.wind_sectors = wind_sectors
         if wind_sector_edge_dim_name is None:
             wind_sector_edge_dim_name = 'edges'