diff --git a/static/js/custom.js b/static/js/custom.js
index 80a4415..956d38f 100644
--- a/static/js/custom.js
+++ b/static/js/custom.js
@@ -915,10 +915,11 @@ function toggle_failover_route_routespage(routeid, current_state, prefix, route_
             // Get the primary and enabled displays for the prefix:
             for (let i=0; i < route_id_list.length; i++) {
                 console.log("route_id_list["+i+"]: "+route_id_list[i])
+                var route_index = route_id_list[i]+1
                 // Set the Primary class:
                 var primary_element = document.getElementById(route_id_list[i]+"-primary")
-                var primary_status = routes["routes"][route_id_list[i]]["isPrimary"]
-                console.log("Setting primary class '"+route_id_list[i]+"-primary':  "+primary_status)
+                var primary_status = routes["routes"][route_index]["isPrimary"]
+                console.log("Setting primary class '"+route_index+"-primary':  "+primary_status)
                 if (primary_status == true) {
                     console.log("Detected this route is primary.  Setting the class")
                     primary_element.className = enabledClass