diff --git a/AdminWebsite/AdminWebsite/ClientApp/src/app/work-allocation/allocate-hearings/allocate-hearings.component.ts b/AdminWebsite/AdminWebsite/ClientApp/src/app/work-allocation/allocate-hearings/allocate-hearings.component.ts
index 8d93ab62f..371f0fb70 100644
--- a/AdminWebsite/AdminWebsite/ClientApp/src/app/work-allocation/allocate-hearings/allocate-hearings.component.ts
+++ b/AdminWebsite/AdminWebsite/ClientApp/src/app/work-allocation/allocate-hearings/allocate-hearings.component.ts
@@ -66,7 +66,7 @@ export class AllocateHearingsComponent implements OnInit, OnDestroy {
     caseTypesSelectOptions: SelectOption[];
     selectedCaseTypeIds: string[] = [];
 
-    private destroy$ = new Subject<void>();
+    private readonly destroy$ = new Subject<void>();
 
     ngOnInit() {
         this.route.queryParams.subscribe(params => {