diff --git a/src/app/components/treeselect/treeselect.ts b/src/app/components/treeselect/treeselect.ts
index ac8feac30ef..2f579cbe859 100755
--- a/src/app/components/treeselect/treeselect.ts
+++ b/src/app/components/treeselect/treeselect.ts
@@ -70,7 +70,7 @@ export const TREESELECT_VALUE_ACCESSOR: any = {
                     </span>
                 </ng-container>
             </div>
-            <div class="p-treeselect-trigger" role="button" aria-haspopup="tree" [attr.aria-expanded]="overlayVisible">
+            <div class="p-treeselect-trigger" role="button" aria-haspopup="tree" [attr.aria-expanded]="overlayVisible" [attr.aria-label]="'treeselect trigger'">
                 <ChevronDownIcon *ngIf="!triggerIconTemplate" [styleClass]="'p-treeselect-trigger-icon'" />
                 <span *ngIf="triggerIconTemplate" class="p-treeselect-trigger-icon">
                     <ng-template *ngTemplateOutlet="triggerIconTemplate"></ng-template>