diff --git a/client_src/js/UI.mjs b/client_src/js/UI.mjs
index b722274..d9e25e1 100644
--- a/client_src/js/UI.mjs
+++ b/client_src/js/UI.mjs
@@ -61,7 +61,7 @@ class UI {
 				})
 			}
 		]);
-		this.ui_panel.setIndex("Reading Type", this.reading_types.findIndex((type) => type.id == "PM25"));
+		this.ui_panel.setIndex("Reading Type", this.reading_types.findIndex((type) => type.short_descr == "PM25"));
 	}
 }