diff --git a/middleware/config/oulu_zone_areas_20241011.json b/middleware/config/oulu_zone_areas_20241011.json
index 01393782..5abe83bd 100644
--- a/middleware/config/oulu_zone_areas_20241011.json
+++ b/middleware/config/oulu_zone_areas_20241011.json
@@ -384,7 +384,7 @@
 				]
 			},
 			"properties": {
-				"Zone": "OLS"
+				"Zone": "OSL"
 			}
 		}
 	]